I did the same thing after reading Cherry mention it...I filed the spacer down to 3.5mm,made a huge difference.

Nice tip on the chamfer on the inside and the old shock tool to hold the spacer Tex...

I just sanded my finger tips down

Rebuilding the fronts tomorow,will add yor chamfer on the spacer and cap...

I have also had very good results using Tamiya Ceramic grease instead of the green slime....less stiction,and am gettting very good life out of the shock shaft coating.

Last years shock shafts are going back in for this season,virtually spotless