well tom opinions are like noses, everyone has one!!! my experance with fox has been good. i do think their carbs are not as good as say os, or perry but their engines if properly broken in and the proper fuel used are great engines. my exper. with the .61 hawk was great, easy starts one or two flips hot or cold!!! super power, great tick, tick, idle and more. would stack THAT engine up against an os any day and really like os engines. enya was another good glow eng. take a lot of care to break in but once broken in they will last a very long time. sweet runners too. i have an enya 1.55 4 strker. tough to break in took a long time and a lot of fuel to but it was worth it. a real stump puller and super reliable. at least that's been my exper. (50 years or so now) NOBODY'S GETTN' OFF THIS ROCK ALIVE!!!![:@]