I ran across a pair of 08kxf a 250 and 450. They both had a sleeve first thing on the shock shaft before the top out plate as to act as a shaft extender. the 250 showa shock had a 5.5mm sleeve, while the 450 Kyb had a 3mm total of machined washers. What's the use of this? Is it really a plus to increase shock travel? I guess this would change the sag numbers at least a few mm.