Waldo, just a tip from personal experience;
Get a carb filter!! I've put one on my O.S 46FX and 61FX. That way, you always keep the air intake clean. If you happen to go down, at least you keep the dirt out of your expensive engine. Less chance of wear through dirt in the crank case and piston
just my .02 bud......
When I crashed my Nexstar, I did not have the carb protector on the carb...while I had the protector at home, sitting in a box that had just arrived from the hobby shop. I was too lazy to get it out of the box, and I crashed that day!
] I learned from my mistake...got the protector on the .61FX in my Twist now.....cheap protection for an engine...