One little detail about that block.
I have that block for the 3080 ti, and the anounced measurements are for the "carbon fiber part" for some reason the outlet-inlet chrome piece is not included... this is causing me some problems, it´s just 15 mm or so, but is enough difference to wrck you in these kind of builds.
This is for the 3xxx series block, maybe this new one have the measuremens corectly written on the spec sheet.
looking forward to see what your next build will be.
My guess is that petricor has realized that the only way to top what has already been done here is to adopt the PCB-trimming tactics of the console portablizing scene, and that the next iteration of this will feature a 4090 with every possible extraneous mm² of PCB cut away, alongside a fully custom CNC waterblock.