Victor,
thanks for the additional pictures of the glow version. I think we'll likely have to wait until a production kit is available to fully understand how it comes together.
Without wanting to jump the gun, my first impression is that a little more consideration might have to go into the redesign to make it suitable for a powerful RE two stroke such as the venerable OPS of which SA is now a dealer. The space allowances for both the piped exhaust and fuel tank seem a little restricted. Then again, the airframe looks like one which might come in at an AUW in the 6-7 lbs ballpark. For such an airframe a lighter less potent engine such as an OS 55AX would likely be fine much like how this engine is recommended for the ARF Curare also produced out of Europe.
In any case, I look forward to seeing them in production and getting feedback from other pilots.
David