@topJimmy re: grip shape - switching from wilson this gave me initially trouble as well, especially on the forehand. Similar situation as yours where I demoed a 3/8 but usually play 1/4.
Ended up buying one MP for extended demo in 1/4 grip and replaced it with a wilson shaped pallet from the custom shop in NYC, but it felt larger than 4 1/4 even though that was the spec.
after a month switched to the Pro with Head pallets and stuck with it. Took 2-3 weeks to dial it in and now I absolutely love the grip shape and haven't looked back. It's specially rock solid with a one handed BH.
Head IG Prestige Pro