Having recently (last month) done Snowdon, kudos on doing that with all that weight. I don't exercise, at all, and 7kg of camera gear on my back was too much for me 🤣.
I went up the Pyg and done the Miners. Really wanted to try Crib Goch, but glad I didn't. If I went back, I'd do it without any extra gear and make sure I trained beforehand.