[wogpotter]

The main thing is to have the scope secure, safe, unstressed & true.
All those things can be done with nothing more than practice, a good well-fitting set of screwdrivers & a bubble level of some type.

The kits make things easier to do well, not "better" than without. That's MHO, but it has worked well for me for many years & several mounts on different rifles.

Tricks to make it easier,sure, here's a few.

Don't try to tighten the mounts to the scope one screw at a time, it won't work out well.

Put a single layer of electrical tape, the regular black sticky stuff, on the inside of the rings before you start mounting the scope tube. press it in flat & wrinkle free & trim off the excess with a single edged razor blade.
Make the ends of this tape a fraction short of the curved section (about 1/8" is perfect.)

Now mount the mounts to the base or rifle, depending on what system you have. Tighten the screws almost tight, then go back & fort among them tightening no more than 1/4 turn till all are tight. If you want to use loctite, use the green.

Securely mount the rifle in some kind of holder, a cleaning stand, padded vice, anything that will keep it secure, let you make adjustments & clamp it without damage. Bungee cords are great to secure the rifle temporarily without marking it BTW.

Lay the scope tube in the bottom half of the rings, drop the tops on & snug up the screws evenly, fiddle with the screws till the gaps are even between the tops/bottoms, fronts/backs, & lefts/rights. Don't try to fix this later, do it right at the beginning. The scope tube should stay in place, but be slid-able with a little effort. Mess with the screw tensions 1/8th turn or less till you get exactly to this point.

Mount the rifle, just like you were going to fire it, now wiggle/slide the scope to get the right eye relief for YOU, no-one else. Don't worry if the reticule is a little off of vertical/horizontal at this point.

Once you have the eye relief set, twist gently to get the cross hairs square to & parallel with the rifle's sights. NOTE I do NOT say "level" you don't care if they are level you care that they are aligned with the axis of the rifle. If you have the rifle level, that's nice, but not essential. If you have a flat somewhere on the rifle use the bubble level to check for cant. Usually there is a flat somewhere, it sometimes takes a little effort to find though. The iron rear sight blade top is usually a good spot if nothing else works.

IF you go this way use the bubble level to check the scope on the range adjustment screw, the actual screw itself, not the cover for the turret.

Slow & easy tighten each screw a little, then tighten the exact opposite one the same amount just keep going round & round, checking for no moment at each end of a cycle till all screws are tight & all gaps are even.