Design updates:
1) gpu moutning, optimized away a flange and made the whole thing a bit smaller. Lost a mounting location but thats ok.
2) tweaked it so all exterior dimensions are whole mm increments. The GPU bracket is 56mm x 120mm and the motherboard tray is 56mm x 179mm. Most importantly...
Finally got around to updating the OP.
I did all my testing and some photography, and sent a few prototypes to some friends to play around with and gather feedback. Everything seems to fit, although mounting the GPU is difficult. The mounting flange gets in the way of the screwdriver so...
That's a solid plan.
I regret not doing crowdfunding myself, I just decided to go for it with 100 units lol. Best of luck! Let us know when the crowdfunding is live
None of the manufacturers have any cocerns about the joggle.
I got feedback, it is in fact the pem nuts and standoffs that are cost drivers for this. I can save a lot by omitting the pem nuts (i understand the standoffs are mandatory).
How important would you say is the ability to bolt to this...
That's a joggle. I didn't think joggles are hard, I figured a hem is harder. I don't think I'm gona be doing enough volume to do stamping, I don't have that kind of cash. So laser and bending most likely. But I leave that up to the fab
You'd be surprised how significantly part count impacts final cost. Unless the bracket is off the shelf it's an enormous cost driver in low volumes.
In fact that little pinch plate for the GPU that's part of the GPU bracket but is a separate piece is like 20% of the total cost. I'm still...
It's 1.22mm cold rolled steel. (0.048" 18 gauge).
I initially had a version that bolts together as well but that made it notoriously difficult to support all 3 configurations while actually being rigid. I think all that rigidity will come from the substrate it's bolted to. Won't know until I...
You're right. Even if the flush screw doesn't sit completely flush (not enough sheet metal thickness for that) its still lower to give more clearance. And the M3 screw head should clear the hem. Thanks for the suggestion, I have made the change:
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