Hello. I'm about to start chinking my newly sided cabin. I've got 10" hand-hune spruce boards that are 1.5" thick. The spacing is 1.5" between each board. I'd like to fill with 1/2" chink with a pneumatic gun connected via snorkel to a 5 gal bucket. Is it easy like caulking a bath tub or far more difficult? Any hints, tips or suggestions are greatly appreciated. Pieter