I never had any intention of breaking it up, just curiosity to see how much the BBC had managed to modify it - their work is not always good . . . in fact, sometimes it's shockingly bad!
As for Rabco arms on the TD/7, I don't know, it's not one of my specialisms. I suspect not.
There's a lot of information here:
http://www.orbem.co.uk/grams/grams_1.htm
The TD/7 is another item that's never been tried or restored - just put away until one day (hopefully) we can exhibit it properly along with all the other hundreds of tons of kit . . .
It takes a lot of money and it's not an easy proposition.
Best regards,
Paul M
BECG
www.becg.tv