I got mine from Abby at Flightline. I have flown with them since day 1. I was out flying this weekend at -6F and was actually comfortable in the RV-14 after I got climbing out. It's painful getting in when the engine isn't running though.
Wow, that brings back memories! I used this design on all three of my RV's I built! All are still flying, one still in New England's cold winter weather. I still have that print on a legal size page... The only thing different is the email address...
Mine have been flying in the RV-6 for nearly 18 years and continue to work as designed.
Excellent summary (nicely done Sam!!) of all the details for warming the cabin. Note: Abby uses a strip of velcro on the split seam to allow installation without removal of the pushrod tube. It is sewn on the ripstop material. A light weight material retains the light control feel.