Ok so a successful afternoon of work yesterday! I got the cockpit locker cleaned out - the two manual bilge pumps were both cheapo plastic ones that were buggered so they got chucked. I used my new electric pump to empty out a heap of water - she sits up straight now - woohoo!
There's still more water in the bottom of the cockpit locker but there is lots of crud down there to block up my bilge pump so I'll have to get a net or something to strain it out before pumping.
I found a diagram of the boat which I'll post up so I can get your opinions on the best permanent location for the pump.
Apologies for the state of the cabin - I've already taken out a ute load of junk but there's another couple to go!