REMIX Bracket PCIe PiKVM reinforced

Update 12/20/2024 - Reworked the cover plate tab to improve strength and fit. Added honeycomb pattern ventilation holes to the Pi mount to improve cooling.

I wanted to rehome my PiKVM built a couple years ago to mount somehow to my 4U SilverStone rack mounted server case, while adding a PoE hat. I was first considering designing some kind of external bracket to hold or replace the GeekWorm case, but then I found and really liked marcin212's original PCIe bracket idea. 

But after printing it just felt like some of the features, particularly the mounting holes, were too thin and delicate to hold up, even printed in pro-grade, stronger filaments. I then saw Duckle's remix which significantly reinforced the bracket, so I printed it and was quite happy… until I realized my HDMI-to-CSI board was different than the one used by marcin212 and Duckle. Mine is a SupTronics X630-A1 V1.3 with a front-to-back mounting hole spacing of 21mm, while theirs had a 30mm spacing. Mine also has a micro DIP switch on the back of the board which, along with a slightly higher HDMI port, required more standoff clearance (the V1.5 found here does not show the DIP switch populated on the back, so you may not have this issue if you have a different version than me). 

So I loaded up Duckle's model in Fusion and moved the CSI mounting holes, extended their height a bit, raised the HDMI port cutout, and recessed the rear section of the CSI mount to ensure clearance for the DIP switch. While I was there I also removed the reinforcing ridge Duckle added to the face of the PCI slot insert above the USB ports – the additional rigidity didn't appear to be necessary, and I was concerned that it might interfere with an oversized USB plug.

Otherwise it assembles same as Duckle's mount, including use of 8x M2.5 nuts recessed into the back of the bracket. I used M2.5x6 SHCS screws for the CSI board and M2.5x8 SHCS screws for the Pi4. This also maintains the built-in supports that Duckle added, so be sure to remove them after printing. I've included his picture with the built-in supports circled (hopefully you don't mind, Duckle!).

CAUTION: Do not apply much torque to the slot cover screw when installing in the computer case! Even with strong filaments and print profiles, this thin feature is prone to break easily. This update beefs it up a little but it still doesn't take much torque to break it. Tighten just until it begins to feel firm.