Hi, I have been lurking in this thread for a while, but now finally the time has come to assemble my own VB-R-177. I received the frame few days ago, but I am largely still waiting for other parts. One of the things that arrived in my mail today was the bottom bracket. It came with a ~2mm spacer, that I am unsure whether it is needed, or which side of the bottom bracket I should put it on. I am attaching an image to make sure you understand what I mean.
I have a Shimano 105 R7100 crankset, and I will be running the L-TWOO eR9 groupset. How would I determine whether I need to put on this spacer? Did you put one on when you were assembling this frame?