A Hurst T-handle shifter would look sweet and they come with all the adapters for all types of threads.UNIVERSAL HURST T-HANDLE - BRUSHED FINISH
Yeah - the thing about a round ball is that your hand has to move around on top of this object - not just hold onto it - every time you pull the ram. It needs to be polished so it slides around in your palm. I don't think this shifter head would be too comfortable. Sorry.