the original glow carb is totally acceptable as it ran very good with it. But this engine is going into a critical airframe for F3A competition. The tank is located at CG so its necessary to have a pump of some sort. since I was going gas, I wanted to try the walbro on it as its even easier to set than the glow carb. (plus it has integrated pump and regulator, and not to mention its alot easier to choke)

Im sure the 120AX would also make a nice conversion, thou I sold mine before having a chance to try it on gasoline.
If you have an airframe for sport flying there is absolutely no reason to go with the walbro IMO. (although I never tested it that way on an airframe)

Im sure the pipe adds more power than the Bisson Pitts muffler if tuned to the prop load you will exert on the engine but Bisson is also very good for its size and price. I'll be using my pitts on the other 160FX conversion for my Sebart Katana 120 airframe for full on 3D.

I am considering to change my oil from very clean burning Castrol scooter 2T to full synthetic Mobil1 2T Racing Oil at the same ratio or abit lower (8%)

10:1 ratio seems more than enough and I'll be sticking to it for a while.

Ive also recorded a video of the engine running, I will be uploading it very soon.