I am not exactly sure what is considered to be a "soft mount," but with my Roto 25, which is similar in size to the G26, I use the Dubro vibration reducing engine mount and it works fine. I think it was this one:

http://www2.towerhobbies.com/cgi-bin...?&I=LXD633&P=7

with the rubber inserts. The stiffness of the elastomerics can be adjusted via the mount.

-Ed