Have just come back from testing and setting up the above, flew out of the box with the standard settings albeit a bit wishywashy, tuned the PIDS in rate mode, very crisp with no oscillation, just need to figure out why there is a very slight yaw movement nothing worrying but its there. Have also tuned self levelling which works spot on. I would have tried alt hold but i'm at work and there are way too many cars around on the industrial estate.
Setup as follows QAV 250 Frame clone
DYS 1806-2300kv motors
SN20A ESC with BLHeli V14 One shot
Qav 250 PDB V2 (no wires)
3dr MTK 3329 GPS @ 5Hz
on board mag.
2250 3S Lipo
Looking forward to tomorrow, would like to try ALT Hold and may be a couple of way points.
Thnaks to Icee for answering a couple of questions and helping out and to all the other guys who put in a lot of time on here!!