Bought a set of Seekins 34mm scope rings to mount a S&B PMII. Do I need to lap the rings before I mount the scope? Some say it’s needed others say it’s not. I don’t own a lapping kit and doubt I would use it much. If I took it to a gunsmith to mount the scope are they going to lap it? If I needed to buy one is there one that could do 30mm and 34mm?