First off, thanks for taking a look at this, means a lot.   Recently, i have acquired Apple's Mac Pro Gen5 case, which i have wanted for ages. My plan is to custom fabricate a new back I/O plate and the motherboard tray, to make it fit an ATX board, and its expansion. I wish to make a mod worthy good enough that i can ask for sponsorship from companies to be able to fit it with hardware as good as the case itself is.