I hope that thisall gets sorted out, the engine seems to work very well in the DR400 (unlike the PA28 & C172) and if the numbers from Robin are Accurae they are on to a real winner.
My only problem is tha they won't retro fit the DR400, having spent lot getting the avionics the way I like them I am not about to sell the aircraft and so Thelert are not going to sell me an engine! (with the fuel tanks fitted in my aircraft the Thelert engine will give an endurance of about 11 hours!)