Call the guy at Planes Plus. He sold me a mount for my SJ1200 (about $20) which worked great. I cut off the mounting flange and bolted it to the mounting block. He told me to add a little bit of donthrust to the engine (placed two thin washers beneath the rear mounting bolt). HE was happy to give info on the phone and gives great customer service. Have not flown mine yet, can't seem to get a weekend that cooperates with my job schedule.
Tommy