I have 2 OS 46AX's They both are great! One has about 2 gal through it, and the other about 1.... Run them rich 2 tanks for break in, and off we go flying... after about 8 tanks lean it out on the low end, and your gravy! the AX46 on a tower muffler and APC 11.5x4 prop hovers my EF Edge profile at 1/2 throttle... And a nice bonus too, I don't take my starter to the field anymore... Starts 2-3 flips with the chicken stick. I'm very happy with the AX so far... Only deadstick was from a fuel line coming lose.

Good luck!

~Andrew