Right, looks like I will go the 1s route, even though a bit pricey for me.
The open question is will I end up having to move over to let the 2s boys past at club? Guess time will tell!!
I think the way you have the rules written currently ARE ambiguous and need some attention. Sure you will sort it out though.
Now to get hold of the kit I need .... any problem running a Futaba 9550 servo from an Orion 1s ESC or will I need a booster?