I have a 2005 turf tracer HP with the ecs controls, ever since I bought it I noticed when Im running it on large properties( over 1 hour on it at one time) my thumbs go numb.I have talked to the dealer and they said theyve never had that complaint before,I also tried calling exmark and left a detailed message,but they never called me back.every so often I take one hand off at at a time and shake it,it doesnt really help though. it doesnt happen on smaller properties that only take around 15-30 minutes to do though.Anyone else have this happen to them? When I use the exmarks with the old pistol grips,it doesnt happen either! I wonder if its practical to convert an ECS model to a traditional pistol grip? If it would work fairly easy,I would be willing to do an even swap with someone that wants the ECS controls.