Very nicely crafted.
This was a gift for a friend, I also gave him the 2 quart fuel.
We put the tube on and fueled it and got it running first try. And what a good time we had watching it go.
Later at the house warming party, my friend had it running almost all night until the fuel was gone.
This is fun and educational and entertaining.
Both of us really admired the craftsmanship with which this was made.
Very nice, highly recommend.
good product quality is ok.
Runs very smoothly. Very nice Stirling engine model.