I'll bet some of the solid modeler whizzes here could whip up a model with mass built into the components and design the adjustable axle assembly. I just got through the first lesson in Creo (ProE), so I'm still on the basics. BTW, SolidWorks and Inventor are WAY better than Creo ...... if you have a choice.
'03 KTM 450EXC
"If you know what you're doing, then you aren't learning anything." - A. Lincoln