Lengthen taper?

[14.1player]

I'm wanting to lengthen the pro taper on my shaft, so it remains constant until closer to the joint. What type of grit sandpaper am I looking for?

Sorry for the stupid question!

 

[Michael Webb]

The only stupid question is the one that is not asked. But just because you have to ask, you should send it to someone, so it's done right.