I guess it all depends how hard you want to fly .... mild wide and gentle, and you wont bleed speed on a P60 .. start pulling it a bit harder , and you will .. I like to go near 200, and keep it there through the turns..

A friend of mine just swapped his P70 out to a P80 on his BobCat, and says even that small increast of thrust was a great boost in performance ..

if ou consider the total investment, a few more $ to go from a p60 to a p70 is more than worth it ( if not to a p80 or 120 )

either way, this is one fun plane !

Wojtek