Hi Colin (and anyone else put off Borg due to lack of info),
Just to let you know Borg do an entire visual range as well as their extensive AP range. Unfortunately info on the web is scarce, outdated or confusing. Below are system diagrams for the old 125 mm range, but this will give you an idea of what is available for the ED89 & smaller OTAs
http://www.sciencecenter.net/hutech/...sysdiag125.pdf
Ted Ishikawa at Hutech will readily figure out all the possible part combinations for anyone interested via email - there are dozens of options and the tailoring/versatility is a huge strength once you know what you need. Claude at AEC can order them all in. Parts are interchangeable so it's easy enough to have both AP & visual capabilities.
I was nearly deterred from Borg myself, but I'm very glad I persisted. Borg are genuinely great quality scopes but could do with a serious marketing & advertising overhaul!
Good luck with your search.