2015, you’ll be just fine with long mounting legs. You can also use short shaft pots. Pickup rings are whatever you want to get, as there shouldn’t be any issues with fit. The pickguard will most likely not fit, as there may be discrepancies in distance between the pickups, and also issues with the top mounting screw location. MojoAxe.com has done some Gibbons shaped pickguards for Heritage guitars. I’d contact Dan at MojoAxe regarding the guard. As far as pre made wiring harnesses, I’m not 100% as I usually make my own, but I’d have to think that they should fit. Again I’m not 100% on that.