Many thanks for your advice, Peter.
The Wheatstone is still on approval, I realised very quickly that I wanted to take up the duet again, but with a higher quality instrument. I've been spoiled by my other boxes apparently.
Yes, Chris offered to give me a full px value against another instrument later on - we both though that it could be a long time before something suitable came up.
This has not proven to be the case, though, I've heard from two people on this site, as well as a couple from the Facebook group and there are two serious contenders, one as a final purchase, and an