The "Little (totally absent) Wing" designer obviously feels that it just must have (reliable) 100hp. I can, sort of, see that. As the owner of the Marque you don't want people fitting all sorts of unsuitable engines, getting into trouble and getting your nice flying design a bad name. Of course one can always buy the plans and fit whatever suits you. Certainly as the rotor, & equipment is sooo expensive. I hope Bex can design (and test? ) a cheaper construction method than cutting the wings off a Cub...
Then , with his 3 cylinder engine purring sweetly away, Take China by storm and fill the skies with the chop-chop sound of money..... Isn't the company that makes the rotors called "Dragon Wings?" How appropriate