I keep hearing some of the posters here make the claim that pistol grips on a walk behind mower can be hard on the hands and wrists. And some of those posters say the Toro T bar system is superior due to less hand and wrist strain. Can anyone explain this in more detail the how & why? Last Dec I bought a Quick 36 and it's my first shot at a greater productivity. I'm also considering adding a Toro 48 hydro drive T bar or pistol grip hydro drive at some point. This really depends on cash flow from mowing vs. my other services. Any input greatly appreciated.