if you do get it ground, use a reputable company.

i had 3 bad experiences from 3 seperate well known companies up north

on every occasion when ground they "melted" and made the flywheel lumpy like a slick gets rubber knobbly bits on them.
I was deeply un impressed and they had to be binned.
A mate skimmed one for nowt and it was perfect.

doesnt mean to say my bad experiences will be like yours though