Power unit for Foam Glider

I found these gliders on Amazon and was amazed at the performance. Of course eventually we try to improve on what is already a great product and I decided to add power.
These gliders are virtually indestructible and lend themselves to be easily modified and still retain strength.
The resulting flights are amazing, but be prepared to loose them as they are free flight and fly for a very long time, by putting the tail plane in stunt mode it produces what is best described as a drunken stunt pilo