Sorry for the delay in responce but the pictures are direct from the manifacturer. SV engines claims to be the manifacturer of he DL Engine Line and is producing both the DL50 V3 and DL100.

They have the DL50V2 but have claimed to have inproved it by changing reed valves for more power and changing the case to fit internal changes to lower vibration. it also looks more like a DA. I did not ask why they changed from 4 to six bolt pattern.

I have both a DL100 and DL50V3 on the way for testing and if all goes well the Planes will be ready to take to Joe Nall for all to see.