Nasser we all started off with low time, and you are learning on a good stable machine that performs well.
The ArrowCopter does well with the 914, not a great power to weight ratio but I believe that Chris has indicated that they are in collaboration with the Rotax factory for the latest engine being developed, which may be the 914 IS
I was very privileged to have had a demo ride at the factory and was most impressed with the factory facilities, quality of the build, together with the extensive research and testing that was done during the development of this top of the line gyro. There also when Claudius and his sons were building, documenting and videoing their build of their US beautiful red ArrowCopter
The choice of engine was dictated by many factors, built in the same country, close nearby, excellent collaboration, along with the well known safety, reliability and history of these engines. It seems to have been a good match and if there is some improvement in HP forthcoming it will be an even better performing machine than it already is.