Quoted from minnesota13:Indeed the screws stick out a bit, but they are well below the playfield with the playfield down and thus have no relevance to any decrease in clearance. On the other hand using an adhesive tape does decrease clearance X2 (both sides) and side mirror removal for any reason is not only difficult but has caused damage to wood sides and side mirrors when removed.
Some producers also provide or recommend felt on the playfield edges. This has been a disaster when the felt pulls of and the felt adhesive gets all over the mirrors and playfield. If you fear scratching your side mirrors when elevating your playfield, why not put some paper between the playfield and mirror before raise the playfield.
I have removed standard side mirrors to install colored mirror sides and was able to reuse the standard mirrors on another machine as original screw mounting permitted ease of removal with no damage to the sides or mirrors. The screws are very small and do not require any cabinet drilling for installation as they self tap into the wood through pre-drilled/cut holes in the side mirrors.
Side mirrors for the money is one of the easiest and inexpensive ways to add some life to your playfield.
Good point, transfer adhesive is so thin that the difference is negligible. It's been a while since I've seen the install using screws, what attaches the top of the blade to the cabinet?
I agree with the adhesive if you remove you'll most likely have to do some touch up.
You may have an idea, someone should come up with a guide to put between the blades and the PF when lifting. I think paper would not be very good, it would have to be something that won't tear like thin plastic or something along that line.