Thanks Mike I will either get the Graupner 14x7.2 or Master Airscrew 14x6 or 14x8 . It 's easier for me to get the MA because I can just add them to my order from my LHS . Of the MA which do you think is best 14x6 or 14x8 ? Two of the Graupner props with shipping will cost me $30.40 with out tax while 2 MA will cost only $12.60 and no shipping .