Zspray owners - I have very little experience on zero turn equipment but when I demoed a Zspray, it sure seemed like a struggle to drive. It was a little twitchy, the caster wheels always seem to be headed in the wrong direction and you come to the most abrupt stop you've ever seen if your hand slips off the controls. All in all, it wasn't a smooth experience. Do the controls soften up over time? Any tips on dealing with the caster wheels?