Per novice:
I want the shaft length to be adjustable. cost is a big factor. I guess
i'm looking for a good substitute brand that is not so popular . epic
seems too expensive.

Do some Googling. I did it a few months ago and found some discontinued
Carlisles for about $160. Didn't buy - had already made the mistake of buying
another brand.

One thing to check is the exact nature of the connection. I bought mine
assuming that for that kind of money the connection would be reasonably
ergonomic. Wrong!... turned out to be a hose clamp (as in automobile radiator
hoses...). Ouch!.
--
PeteCresswell