Posted By Bob Chester
Kenneth Novak in Ladysmith, Wi. sells 4 vane curved spiders that still mount at the usual 4 90* locations. He has no website and seems to answer the phone only weekday afternoons. I have one in my 10" dob and his 2 vane curved spiders in my 4-1/4" and 6" and am very happy with thier performance. Information can give you his phone # as I don't like posting info like that on open forums.
Hope this helps, Bob