One Storch in Belgium has mounted the D-motor and after adapting cowling (and having reasonable weather) he did first flights on 30 March 2013. This installation has 2 fuel pumps.
There was no space for a correct intake and therefore they went trough the firewall.
After the tests with several props, we realised that we will have to put extra weight in front. With 2 passengers you can not trim the plane, but has to push on the stick constantly. Speeds was 170km / hour. Best results were with 2 blade Arplast prop (154cm) and a pitch of 22.