Another thing to remember about DA and the support they provide is this. I had this happen to me on two engines now. One was a DA50 and the other a DA100.

Both engines were bought used, both were somewhat old. I called DA with both serial numbers to get the history before I bought them and they said they were due for some updates but there was no other history. I packed both up and shipped them. I got them back in 2 weeks, fully updated and it cost me 45 in shipping. I offered to pay since I bought them used but they would not hear of it.

I also failed to mention that the 50 got a new rod, piston, carb mod and gaskets. The 100 got a carb mod and new gaskets. So basically one engine was rebuilt, the other was cleaned up and resealed.

Yes, there are more powerful engines out there. BUT one thing I've learned over the years in dealing with any company is to me, customer service is everything. I will gladly pay extra to get that.