Con

90 degree angle brackets or blocks with threaded screw inserts may be the simplest and most effective way to do this.  That's how SunbeamTech used to make their acrylic PC case kits, and it seems to have worked well since I've never heard of one falling apart.

Go to the automotive store, look at their wall of hose clamps and spiggots. That's exactly how computer watercooling started back in the day. I have fond memories of super jank watercooling. Enjoy the ride. 
 
As for measuring, just get a set of cheap calipers. 

I took apart my Corsair H115i and spliced a GPU in to the loop, with a small reservoir.
It worked well, but the pump had to run at max rpm all the time to keep the flow going.
I used soft tubing and fittings made for the tubing.

NVMe is still expensive and won't benefit you in this case. If I remember correctly they have high sequential speeds, making them ideal for transferring large files, but about average random speeds which is the more everyday workload.

https://m.ebay.co.uk/itm/HP-Elite-Intel-Core-i5-2-6GHz-8GB-500GB-PC-Desktop-Best-Deals/132591161729?hash=item1edf0c9181:g:u5sAAOSw-tFa2ko3 96 pounds
https://uk.pcpartpicker.com/product/4mkj4D/crucial-mx500-250gb-25-solid-state-drive-ct250mx500ssd1 62 pounds

PCPartPicker part list / Price breakdown by merchant
CPU: AMD - Ryzen 3 2200G 3.5GHz Quad-Core Processor  (£77.99 @ Aria PC) 
Motherboard: MSI - B350M GAMING PRO Micro ATX AM4 Motherboard  (£61.98 @ Ebuyer) 
Memory: Crucial - 8GB (1 x 8GB) DDR4-2400 Memory  (£60.17 @ Amazon UK) 
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive  (£35.80 @ Amazon UK) 
Case: Rosewill - FBM-X1 MicroATX Mini Tower Case  (£19.19 @ Amazon UK) 
Power Supply: Corsair - CXM (2015) 450W 80+ Bronze Certified Semi-Modular ATX Power Supply  (£47.99 @ Amazon UK) 
Total: £303.12
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-04-14 19:32 BST+0100
 
EDIT: you can opt for the 2400g if you want a bit more performance, but i'd rather the 8gb of ram if your budget is closer to £300

I was on my bus to the city centre when I noticed this.

I was on my bus to the city centre when I noticed this.

I was on my bus to the city centre when I noticed this.

oh missed that you have a ps3. a quick google search shows not many are still selling ps3 accessories.
have a look for esata enclosures. I think this should do the job

its gonna be little off topic and im not sure if things changed since 2012 but I remember PS3 having maximum drive capacity limit around 2tb because of fat32 (and formatting required for ps3 to recognise the drive)

Yes the extreme has a better cooler but not much better

yyes you should be. Just turn up the power limit and you will see higher clocks out of the box if you ramp up the fans a bit. The Xtreme just has a slightly better cooler if am not mistaken. Just do a bit of overclocking. I just ordered the exact same card today and i can ell you my results if you want when i have it next week hopefully

You need an entry-level job in support or work in a shop building computers, or a service division (ex. Best Buy Geek Squad (shudder)), or be able to show knowledge from hobby-level endeavors if they take that into account.  My first job was working at Dell technical support in escalations.  It involved networking (the people version) at job fairs, taking onsite-placement tests, etc.  Having certifications also will help you, sometimes as much as a degree or more with certain technical jobs.  Barebones basic certs like A+ and Network+.  CCNAs are good to have too but loads of people have them.  Certifications that people can verify show at least you have a certain knowledge set and will make you more attractive to technical recruiters.  Most job resume algorithms are going to be searching for keywords like that.  You can also use LinkedIn, and pepper your job or hobby history with keywords like for example, CCNA, A+, computer, customer server, technical support, networking, Cisco, ASA, IPS, etc.
 
Also, always have a couple of good questions to ask the interviewer, like, from your perspective, what do you think makes a person successful in this job role?  Always show you've researched the company.

http://www.chevolume.com/
 
20 bucks, but seems to be the only one around that works this easily 

Then you only require the TV to be capable of playing the file

It comes with an Optical Output (or you can use ARC), not an Optical Input. The Output is supposed to go to a decoder (the decoder can hookup to your amplified speaker set). 
 
 
 

https://www.amazon.com/Pioneer-VSX-531-5-1-Channel-Receiver-Bluetooth/dp/B01G5XKNKW/ref=dp_ob_title_ce
 
You need a receiver yeah?
 
 

Might be a little hard to get anything smaller than 4GB these days unless it's new old stock but Sandisk cards are considered to be some of the best, I've have a few of those that have been running for multiple years without issue.

you mean 5tb?

no problem hope to see your build soon

http://www.frozencpu.com/products/26071/ex-pmp-353/Alphacool_Eisberg_Solo_High_Speed_Edition_CPU_Cooler_Pump_Combo_-_2400_RPM_-_Black_12199.html?tl=g30c85s1703 
this might work but its 5.5 cm 

Oh and make sure you make a build log. I would follow 

IIts using the g41 express chipset, which supports up to the 1330 fsb. So it might work
 
If you have the cpu, id check it and it won't do any harm trying.
 
I might not work with that cpu as its a older chip(2006) and this system is a late lga 775 system(2009).
 
A e8400 should be a good bet for that system.
 
A cpu won't make a big difference in the speed of the pc. You much better off geting more ram and a ssd, and maybe a sandy bridge or newer cpu sometime later