I saw a pic of this boat posted last year and recently stumbled on more info and pics if anyone is interested. Sure is a neat little boat and I bet it would move well with a 20hp OB.
http://www.ikarus342000.com/ECOmotorboat.htm
scroll down to the bottom to see more pics and a link to trip photos as well.
http://www.ikarus342000.com/ECOmotorboat.htm
scroll down to the bottom to see more pics and a link to trip photos as well.