rockergage

I have been at this for a while i guess, but i've had trouble doing anything in Sketchup and MS paint isn't exactly the most accurate. For computer info, Asrock fatal1ty Z97 ATX Motherboard, intel i5-4690k, GTX 1070 MSI gaming X, 2 drives one ssd and the other a HDD and a RM750x PSU. If anyone that knows Sketchup or some other Cad program well i would pay you if you think you can help me just message me and we might try to work something out. THe problem i have is that I either don't understand the program or they are made for people who while they care about accurate measurements don't think of just letting you add in math. Here is a very very very rough image with what i believe are inaccurate measurements for the sides.

I was hoping to get someone to help me draft a plan for a laid out rackmount case. I want it to be 19"x19" for the dimensions and then be 7" tall so would i am looking at is a [] [][][] [] And have the four parts that 'hang' loose fold up as walls. I'd like for the back panel to have holes for the PSU and a backplate area with above where the Motherboard I/O would be i'd like to have room for a 120mm fan. On the front i want room for a blu ray drive, a 120mm dual radiator laying side ways, and a power button. On the left and right walls all i need is area for screwing my rackmount rails to. If you'd like to help me contact me, i plan to do this with a plasma table and would need it as a JPG.