RE: DL-50 engine
There is no info on the 4 cylinder other than coming soon but that was announced months ago. The DL factory is very good at keeping things quiet until they want you to know.
And Bosco, the DL50 thread isn't going anywhere, it'll just have a younger brother to mentor along. If things go right you guys will keep them separate so things don't get confused between the two, I expect they may have some differences worth keeping separate.