I am thinking seriously about ordering the Sea Service musket. I like the shorter,37" barrel and a little less weight. As for drilling the vent hole, you shouldn't have any problem with that. The spot to drill is already located with a center punch, so all you do is drill through. I would start out with a 1/16" hole and if that doesn't work good, go to a 5/64" hole. I would also pull the breech plug and with a 3/16" ball bit on a Dremel, cone the inside of the barrel some to get the powder closer to the pan. I have heard that their 3rd Model, India pattern is a bit on the rough side. But all reports on their other models are good. It depends on what you want it for. If you are into re-inacting you ma want the 1rst or 2nd Model Bess. If you want it for hunting, which is what i would buy one for, the Sea Service may be a better choice. I'm sure Musket man can give you more info on Bess's than i can.