After the near side failed recently I had a moment of inspiration. I decided to modify the Sylva Autokits mounting to give me adequate clearance for a full sandwich. This involved disassembling the bottom plate (next to the engine casting) with a 1mm cutting disc and removing 12mm from the fabrication and re-welding the bottom plate back on.
|Failed sandwich rubber|
|New mount design note new base plate|
|Finished sandwich in place|