I have a PA12 0-290-D2B upgraded on Copper River Airmotive STC SA1-373 which included reinforcing the two lower outside motor mount tubes with split 7/8"x.035 1025 tubing welded over the original 3/4" tubing. I'd like to upgrade to an O-320 series, and am considering Kenmore SA4-456. Before I purchase it can anybody comment about the mount upgrade on that STC? I'm hoping it is the same and possibly transferable? Thanks. Brian