When pivoting the Lever, Short Collar (Green) and Full Collar (Red) has different point of contact, this makes you need to make adjustments for the shaft size if you are swapping Short and Full Collar.
EXCEPT 9.5mm shaft, it is the only shaft size the makes contact on both Low and Full collar with the same angle.
Full Collar is less popular option because it only compatible with enclosure that having 35mm hole, but few old school players still prefer Full Collar, and we hope this article can help them to fine tuning their Golden Lever.