Fat Hand Luke, er....Dan
I use a Renger 1/2A handle and, with certain mods, I am very happy with it. However, I do have small hands. It actually wouldn't matter though, because I have found that holding it just by my fingertips works best for me. I put three fingertips thru the hole and the thumbtip on the back and I like the sensitivity.
The mod is essentially changing from the Spectra to some .018" stranded cable and using a 4-40 screw with washer to clamp down on the wire for adjustment. I use it with the 1-1/2" insert on everything, so no "trimming the handle" for me. Mine was built from the RSM kit.
As built, the maximum inside dimension on mine is 3-3/32". The other way, it is about 1-1/16" from the bottom of the finger grooves to the crossbar. (Mine has the further obstruction of the adjustor tab.) It is a good fit for my small hand, if I were to use it like a conventional handle. But I prefer just using my fingertips. I use it for all my 1/2A stuff except mouse racers. I just use my standard "stick" for those.
The Divot