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Oh yes, I also have 2 pairs of SKS, one new to be installed, and it is just some plastics – but more small parts are delivered with them. On a daily basis they are totally enough though.
The GB are just nicer, and I just like to touch them. Some parts are missing, maybe I will even go down to 2.15 tyre (now 2.35) on the back. Now the fender is a little bit too high, with only some pencil in between before I'll drill the hole at the brake thread.
My GB came undrilled (that was years ago mind). Hours of fun fitting them (I outsourced obviously, the mechanic hated me for it). I can't wait to need a pair next.
On the plus side they are really something else quality and covering-wise compared to SKS.