Between NSW Cup and JBC that might work but wouldn't work anywhere else IMO. It didn't work well in the UK so we had to stop P & R betwen SL and NL1 and until recently every promoted side to NL1 from NL2 went straight down againsomething along those lines sounds good or something like in the uk, with national league 1 and 2. with premotion and relegation would be good!