So for those of you who have purchased the KAK buffer tube Spacers, which of the two are you using to help increase your Length of Arm? I am in a toss up of which one to install as I don't want to be pulling the brace on and off to figure it out. Seems the small/short one emulates about 1 click/hole out on a std carbine tube and the larger one falls somewhere around the 2nd or 3rd hole on a carbine tube...decisions.