Sorry but I don't keep up with what is offered in ARFs but I have built and flown several masters of different sizes. Wonderful plane in any size but I do like the big Sr. Telemaster best of all. Very easy to fly and build. Last one I built I used an OS .60 glow engine. Any electric power system of about that size will work grreat on the master. When I have questions on electric stuff I go to the bottom of the header bar and go to the Wattflyer forum. Good people and a lot of info. Going eletric could be a great way to go. When I was flying the masters we didn't have the battery systems that we have today so I never gave electric any thought back then. Things have changed a lot these days.