Just last night I was looking at engines trying to decide if getting a gasser was feasible or not (with my budget). I was looking at the two mentioned engines also; the DA and the Evo, then the Brisson 3.2 joined the bunch. I am glad this thread got resurrected... answered several questions.

I was looking at the 28% edge myself.

If not, the baby edge will be for sure later this year (have an OS 1.60 for it already)