re: Question for Taylor/Martin guitar guys

Scale: it's a little measuring device,it's got a sliding crossbar,and usually measures in small graduations.1/100ths,instead of carpenters fractions. Personally,I use machinist dial calipers(graduated in 1/1,000 of an inch),backwards by The extending tailrod.

The sandpaper,use that for the bottom of saddle or nut,that's also where the patience comes in.

At the same time,you want to keep a good relationship with your local guitar shop,give them work and be their best customer. They will steer deals your way.