The 3 top engines are the 21CMB Vac ,Nova Rossi 35+21 and the AA 21 you will pay quiet a bit more than your Vertex or Go If your not planing on racing than the Vertex is OK You will not need a 3rd channel remote,as the carb has a high speed needle. A3 channel is not needed at all if the carb has that installed.Like I see in the pic. All grades of Nitro is hard on the bearings so after run oil is needed at the end of the days running.
Search Stu Barr CMB Glen Quarles NR Al Hobbs AA or Roger Hooks Jr