Bob, thanks for the reply. I was told there were two versions. a 40 size and a 90 size. The one shown at www.flyingthingz.com is 40 to 60 size. But also the only "kit" I have seen.
I saw one at this site http://www.netaxs.com/~mhmyers/rc.tn.html but have not yet gotten any info on it.