1. They fit exactly. You download the templates, and place them against your guitar to make sure the holes are going to be right. 2. The weight is probably sli

1. They fit exactly. You download the templates, and place them against your guitar to make sure the holes are going to be right. 2. The weight is probably slightly less than what you have now. 6 grover tuners from my les paul = 272 grams on my scale The tronical tuners, including battery pack = 268 grams on my scale.