Its a pitts style muffler. Never heard of JAS props or Skorpa + I wouldn't even begin to know where to begin finding them in the UK. Im flying freestyle/3D with a Vision so although I want lots of static thrust I also need good thrust at speed. Figured you would be the guys to ask.

Im swaying more towards the Mejzlic because I know they are good props + as it's carbon the hub wont compress when you tighten it up.

Angus

ps im running Menz 22X8 at the moment and im getting 7500.