I've been playing a set of Tom Wishon Sterling single-length irons since late 2018. I love them. I have 4 iron through 9 iron as well as 48, 52, 56 and 60 degree wedges. Same ball position, same motion. I am an analytical chemist by academic training. We always eliminate as many variables as possible to improve consistency. You do have to have decent swing speed for the 4 iron. That might be a limitation for some folks.
I've been playing a set of Tom Wishon Sterling single-length irons since late 2018. I love them. I have 4 iron through 9 iron as well as 48, 52, 56 and 60 degree wedges. Same ball position, same motion. I am an analytical chemist by academic training. We always eliminate as many variables as possible to improve consistency. You do have to have decent swing speed for the 4 iron. That might be a limitation for some folks.