"Also, Arcus engine overheats and you can't cruise to the good condtions. "

Really? Mine has never got hot and cruises smoothly at 85 knots. I appreciate the Stemme's cruise ability is far better but you can get to better weather in the Arcus.

Dave's price surprises me. The full kit was 265k euros 5 years ago including German sales tax. Do US buyers have to pay sales tax?

I didn't consider a Stemme. I wanted a glider which flies like my friends' 18m singles.