I am going to leave the exiting pipe at 2 1/2 co it will be compatible with the 2 1/2" nozzle that McMaster Carr offer. For now I will be using the same 1 1/2 nozzle that the SuperCannon2 had. Have any thoughts or excitement on this?
Edit. The 2 1/2" ball valve was tough to operate probably would loosened after a couple of shots but it cost 28bucks as opposed to $8 for 1 1/2 I am having some regrets maybe I should have used a 2 at least to try and get more distance. I mean it still has quit a volume advantage over the SuperCannon2 but I think it needs a power advantage too

Ok that's it I have to go back. I just called and the 2" is only 10$ I am happy but annoyed I have to go back