There's a Sinar Wolf on http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=627&item=2952674896 Does anybody know if this weighs less than a Sinar F. It doesn't have the usual Sinar rail and clamp so it is presumably limited in extension but do the other Sinar items fit, like a bag bellows and does the back rotate? Is there some reason not to buy one if the price is sensible? Thanks for your help. PL