Exactly my point with the 'power shift' amongst the top 4 with respect to players moving from club to club. I think you have witnessed over the past 4 seasons players making a desperate attempt at loading a team to challenge Caversham. I think now though there are 3 pretty even teams which although still doesn't make a great league at least makes for some great games every now and then.
Mosgiel had a crack at the title in 05 spending a bit of money but failed unfortunately which meant they lost those players they had bought (no not brought) in. Had they won the league they would have been able to make a few additions to the team and could be quite the force today. You could probably say the same about the other two challengers also. I guess you need to take your chance when you get it.