Linn Sara dimensions + designs & Kans

I have 4 KEF B200 (SP1014) bass/mid drive units I got from a friend who took them out of some damaged Linn Sara speakers. The Sara's had enclosure damage and one of the Scan-Speak tweeters had also seen better days, but the B200's are all in what looks like mint condition.

I'd like to use them in a DIY speaker and was planning to build a Sara enclosure. Has anybody got plans/drawings/schematics for the dimensions of the Sara? Any help on crossover design would be useful too. Is the only difference between Sara's and Sara 9's crossover? I've heard the 9's are better - is that true?

If you can help with any of this then drop me a line or follow-up this posting. And if you've got any better suggestions for what I can do with 4 KEF B200 drivers I'd love to hear them!

Currently my main speakers are a pair of Kans, which are fantastic, but unfortunately one of the tweeters has recently started to crackle slightly.
I've been reading various mails about a new neodynium tweeter that Linn dealers might be able to fit, but which tweeter exactly is it and can I get hold of a pair from somewhere? Any other suggestions for Kan tweeter replacements?

On a similar topic, a few years ago I seem to recall seeing/hearing about some DIY Kans that used 25mm MDF cabinets - anyone heard anything similar, or know where I can hold of plans for Kans? What can I say, I have an almost irrestistible urge to build speakers at the moment, so why not try to make something that sounds good?!

Any help would really be appreciated,
David