Haven't noticed much of a difference vs. stock tuners, if anything there might be a negligible decrease in weight on the headstock end, due to the shorter posts. I opted for the ones that lock from the top with a coin for this reason alone. I like 'em. The one thing you have to be careful with is overtightening the cap of the tuning post, because occasionally it'll cause string breakage at the tuning post (which I had NEVER encountered prior to buying these Gotohs). Definitely worth the $50/set I paid for them. And... they do drop right in. Sorry for the late reply, I haven't been on here in many months.