Doh! A couple of typos slipped out before I could stop them. First
of all, the subject was supposed to say (USA) -- these Hoffman
4-bladers have been in widespread use in the UK, Germany etc. for a
long time. The big news is that there is now a multi-use STC for easy
installation in the USA. Second, the product name itself had a slip!
It's the HO 4/27BHM-185. Also, the zip code in Boulder is 80301.
Hope that's all.