I got a return call from Horizon last week. The lady that called said they were picking up the engine and it would probably be available around the end of June. I have got my Webra 55 mounted on a Burrito and like it so far. With the stock muffler it is turning an APC 12.25x3.75 @ 13,000 rpm. I have less than a half gallon of fuel through it, so it may have a few more rpm in it.
http://www.rcuniverse.com/forum/Webr...2740682/tm.htm
The link is to a thread in the Glow Engine forum about the 55.
Eric