Hey Ben, your not alone. I still have twist, but I've often wondered about a thumb throttle. Never had a problem with the thumb throttle on the KX450R quad. My buddy, who got me into quads back in 2002 said I should put one on my bike. Said he wouldn't have a dirt bike with a twist throttle. He raced quads back in the late 80's into the 90's. He did quite well with a few championship titles. It seems it's real easy to over gas the K5 in rough terrain. I have 2 dry creek crossings on my track behind the shop that are very steep in and out. Very narrow, so narrow when your in the bottom with the bike level the front wheel is on one bank and the back on the other bank. Can't put your feet on the ground. 3 feet distance from bottom of the engine to the bottom of the creek bed. Entering it feels like the rear fender is on you back. Exiting, the handle bars are near your teeth. Throttle control is a problem in areas like that, that's my experience. I know, I know you rock and roll riders will tell me "gas it and just jump that little rut". When I run the quad through the same crossing I don't have a throttle problem. As you guys get older your motto will change just like mine did. "When in doubt gas it", will change to "Ride for fun, don't get hurt".