Well....I mean think about it... He says however it can be converted with a Dynamax & .91 Combo, but no turbine. Now think of the amount of viberation,etc off the fan unit, Now think of a turbine, the airframe will come out to about the same weight maybe a tad bit heaver since there is a little extra fuel. No viberation's because of the powerplant, they make things called throttles... Im just interested in the overall quailty of the airframe, glue joints, things of this nature. Wether it says turbines are not suitible or are really makes no impact on me, that's just a disclaimer by the company.