I wasn't at home that time I worked in Germany and was happy that Christoph H. allowed me to work with him. I did that model on purpose, because several our flyers told me that US engines were too expensive (I flew PAs from randy in "Next"). We had problem with enough flyers so I told them that "the engine" is not what gives points, so I did Os Max model. Also "Max" name comes from usage of os max. I had 2 such models and I NEVER needed to deinstall tank for shimming or remove motor for maintanance. They both worked flawlessly and I was very happy with that. However most pilots did not like fact that model did not have classic cowl. BTW as far as I remember also Todd Lee flew in Sebnitz OS powered plane, but I do not remember details anymore.
But planes were available and later dady of Richie K. contacted me to develop model for his son (Richie). I spent with them some time (I worked close to them) and I developed model that time called "Max 60" for ST 60 especially for young boy and large ST 60 with limited handle forces and that model was build in large number and is used by Richie till now also in electric versions. Also our Alex S. (2nd from WCh Bulgaria) uses that model little modified for him till now.
the Max Bee is nothing else only the same Max II with improved fuselage for electric so I was able to use that long nose allowing better side forces for better behavior in wind and turbulence. And also wing went to place where I wanted it and not where pipe dictates. Some people tried to make kits, but so far I do not know if it was succesfull, because I did not see any offers.