Just following up with the completed build!
It turned out great, and the standoffs you shared with the foam adhesive pads were crucial as none of the original mounting posts lined up with the holes on the motherboard. So I used the other plastic standoffs of the same length the help keep the motherboard from toughing the metal where the plastic adhesive ones couldn't fit.
I still have to wire in the power button, and it looks like the front panel controls are just hard soldered, but at least the back panel lines up and I still have access to the network port and a couple usb. The last thing I wish I would have considered was that my sata cables were not right angle, which in this case made it a right fit. Thanks for the help, hopefully that can help anyone looking to do the same thing!
The next step for me is to 3d print a cover for the back panel and PSU.