Ok, so from all the replies, I have decided to wait on buying the radio. I will keep the os 46 LA. but will also buy the tigre G 51. I think the OS 46 will pull better than the 45 on my .40 Tucano. Will buy the G51 tomorrow night. I guess I should've ask here before buying the Super decathalon, acutally I did ask about a sig 4* and funtano .50. Ended up buying the decathalon, bought the 46 LA the same night. The decathalon box stated .40 - .51 engine size. Manual states minimum of .48. from now on will read the manual before buying the engine.

Thanks again all for making it all make sense!