Well, I got my DA 50 back today. They changed the crank, conecting rod, 2 crank bearings and the carb mounting plate. All those items changed on an engine that had only 3 gallons through it. Mind you the only reason I sent it in was because the darn thing exhibited the exact problems that where in the beginning of this thread.

So tomarrow if all goes well I will fly the engine and see what I get.