I have both the 1" and 30mm Wheeler kits and they have their use, however they are not the most important tool I have for mounting scopes IMO. The Wheeler kits are very good at aligning the rings when you have one of 2 different kinds of bases; Redfield type with the adjustable windage screw on the rear base and dual dovetails where you twist the rings in. They will assure that you have the rings aligned and not put stress on your scope tube. They will also let you know if you have a problem with base or ring alignment and might need to bed the bases, redrill the base screw holes or lap the rings.
However I mount a lot of scopes of my own and for friends and I have not had any of the above problems yet. Base screw holes are very seldom out of alignment and quality rings like Talleys, Warnes and others are well made and align themselves perfectly for the last 20 or more scopes I have mounted.
What I do find indispensable for scope mounting is a torque wrench and the EXD Device. Wheeler makes a good torque wrench for casual use like ocassional scope mounting
then while the gun is uncanted you aim the rifle out the window or door to a distant level object (I use a 4' level on a fence 30 yd out,distant building edge or rope with weight on the end will work also) and rotate your scope till the reticle is level with the verticle or horizontal object. If you have the EXD bubble level and the reticle level then slowly lock the ring screws down, alternating from side to side until everything is perfect.