I didn't realize you were using this set. I was thinking back to your Crab build where you explained what you were doing in detail. It showed the hex nuts on the flip side of the round ones in your photo below so I never twigged to the fact that there were round nuts on the same sheet.
The great thing about that set is there are enough to last for a good number of projects. If I can't buy another set down the track I can always copy them in resin