The Comets that flew to Fowlmere, UK were,
D-MCVW, D-MEJH, D-MOKU, D-MOND, D-MTAP, D-MVCW(2), D-MXZZ and OO-F77.
Some info on the UL Power 350is engine here
See Youtube video below of the Monster Comet in action
This blog relates to the B&F FK-12 Comet biplane aircraft - I am endeavouring to identify every example built and present my own Funk FK-12 Comet airplane production list. Approx 112 aircraft have been built by December 2015. All additions and corrections are welcome - Thank You via, bea_steve"at"hotmail.com