Very nice! One suggestion I have based on the couple hours I've rolled the case around to try and figure this out is to use the two holes in the front panel to secure your mount. They're roughly the same width as the provided bracket (and they even line up with holes on each side of the bracket), so they give you an idea of where a good spot to "place" your PSU at (as all panels will fit with the PSU in this position).Thank you for thinking outside the box with the 90 degrees PSU orientation. The simplicity of the 24pin cable have inspired me to do the same. Though I am not done with it, so far its looking good.
Right now I have the mount like this (the included "medium"-length standoffs screwed in to each hole, and the bracket resting on top of them), but I ordered six different L-brackets last night to see if one can be used to secure the PSU mount to the front panel.
Monday or Tuesday should be a big day for me. I have more fittings, tubing, and the brackets coming in, so I should be able to get all four panels on then and hopefully have a secure PSU mount.
I will say that transitioning my parts to the T1 was a bit rough initially (dropping from ~15L to ~10L, and first time working in a sandwich-style case), but the more time you mess around with it, the more fun it is to work in (as you learn how to access each part). I've already started referring to mine as "Bertha" because I feel like you can just slap flour on it and roll it around until you find the "wet" spot.