I have also mounted a lot of scopes...I went to the wheeler levels...if the piece for the action doesn't fit inside the feedrails l remove the bolt and try the rear portion...just make sure you have good contact on each side....
I hope to put this part of gun service in my boys hands...he helped with the last three just recently...and if some other tools improve I am sure he can get a handle on it...
Are you using the first generation 26Reload?
With the second gen, I use the scope base and barrel clamp level to get the level first. Then put the level on the turret and match it to the barrel clamp. Quickest and most precise system I have come across. If something better comes out I will buy that too.
Glad you are teaching your boy! That is how our sport will thrive with the next generation
Leupold has one...bore sight...