How many of you guys mount your own scopes align and lap your steel rings?

I have been doing it with the Wheeler kit for a year or so now when I use Leupold STD rings. I think it works. I have had one Vari X III 4.5-14 on and off three different times for one reason or another and there's not a mark on them. And that was shot thru a 300RUM. Before, it would slide sometimes on the 300RUM.

I am not sure how much lapping to do however. I usually follow the directions and lap until I have no grind left from the compound. Wipe off and start over. I do this 3 times. I am mounting a real nice gloss scope right now on a 7mm-8. And want to make sure I don't mar it up since I trade and sale so often. So am in the process of lapping.