As for the Tower 46 -- I own one & I also owned its brother the GMS 47 (same engine). Several of my friends also own either, or both. I despise both of them. The Tower & GMS are certainly powerfull, but not inhertently more powerfull than an OS FX or AX, or a TT 46 Pro. The relatively high output results, in part, from their tuned muffler -- without it they are no more powerfull than the OS or TT engines. However, the OS & TT engines are a LOT more user friendly.

The price is highly appealing, as is the phony advertised power, but they have highly variable quality & some are just fine (more or less), while some are terrible, regardless of how "talented" you are at tuning them. Sure they can be made to run -- I still use mine --but the pain in the ar$e bother of tuning & re-tuning every time the weather changes just isn't worth it. Nor is the frustration of an engine that won't shut off, or one that flames out with intensely annoying frequency, particularly appealing.

I use mine in expendable applications -- because I truly don't care if it bites it.

I guess that you can tell I'm not a Tower 46 fan.

Now the Tower 75 is a whole 'nuther story.