I today ran a club 500 with a new component shop 4600mah pack, it was good, but not noticeably any better than an old 3700mah pack, but I am sure it will improve with a few cycles. Ian is now using the newer red cells, and the wire is really good quality and flexible. I got deans connectors at no extra cost.
I wanted higher mah so I dont have to keep recharging batteries between runs, and the boys can run the boats for fun for a longer time
Wher are you racing nige?