I have a Tideace CR-060 frame and tried to use a Ritchey Switch upper headset. This left too much gap between the dust cap and the frame. After looking further into it I found that this headset and most others (FSA, Pro, Acros, Cane Creek, Wolftooth, Chris King) all require 8.5-8.7 mm insertion depth in the headtube, and this depth only measures 6 mm on my frame. What options are there for shallower than 8.5 mm depth?