I bought this frame as well for my wife, in size XS, from velobuild, version gf-003. Very happy overall but am struggling with having a snug fit while installing the headset. I am using the headset provided by velobuild. My understanding is that the order is as follows from bottom to top:
- fork
- crown race
- bearing 1
- (head tube)
- bearing 2
- reducer/compression ring (don't know the name)
- metal washer / shim
- dust seal
- all the spacers I want
- top cap (on top of star nut).
I see quite a wide gap at the bottom close and at the top of the head tube. I am not sure if (1) the two bearings are the same, although they look like exactly it, (2) where the metal washer/shim goes. Attached pictures of the space I have