Pentax Rear-converter-A 2x-L on ebay (shameless ad)

Hi all,

apologies for shameless nature of this post (are ads allowed?), but I thought someone here might be able to make use of the following:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7541541950

I bought it off ebay myself a couple of weeks ago, but it doesn't fit the lens I was planning to use it on (a tamron 300 f2.8 which is also now on ebay if anyone's interested). Less than a mm in it - very annoying!

The L rear converters don't come up very often, and I'm sure I don't need to convince anyone here of their quality. This one really is in fantastic condition.

Steve