Shimming just helps from breaking the brake switch nub off when re installing. Its not necessary if you know what your doing and are careful when putting it back together.
Just squeeze your brake lever in and shove a piece of cardboard in the gap to hold the handle in before removing any screws. Remove cardboard when its all back together.
2010 FLTRX , Stage 1, 13" Madstad, Mono tubes, SuperShox, Heritage style bars. Alpine CDE-HD149BT,Soundstream Picasso Nano Series PN4.520 , 5X7 and 6.5 Infinity Kappa speakers
If I have to explain ,you wouldn't under stand anyway.