Sorry a&c
Have to agree with CSX in this respect. They ARE groundhogs especially the lower powered versions and especially on grass.
On tarmac you can load any of them to the gills and as long as the runway they will get off and fly as it says on the tin with good performance.
PX had the 160 engine and flies beautiful with it but four up and some fuel and the sloping RWY at Sywell made for a bit of a toecringing experience, despite the POH saying that it works (well it does work but not especially sprightly on the initial acceleration and climb!)
And CSX is right about the spares bit!
FD