The curved bars added a little unsquareness as expected so I need to get it squished a tiny bit so it's in perfect square form so I can get the accurate curve line for the motherboard tray, this bit really needs doing to keep the squareness of the case, so really I need to make a jig for a jig for a jig lol, I'll have it sussed & done soon, I could simplify this part but it would be a gamble for it being perfect so I'll go for the j4aj4aj , had to take a break to have a think of a solution & the day is still young so I'll get started on it in a mo .