Git it now - though you had the box in bits so couldn't understand why you needed someone to tell you the size.
No RD fella I don't have it in bits, it's mounted and the bike was finished and run for a forthcoming competitive Africa International Show, when the KS prob showed up. Am trying to avoid any more stripdown than necessary by extracting the old inner KS bush with a pilot bush remover, but that is 10 days postage time from Europe away....meanwhile..... anyway, luckily Durch BSA Owners website has allthe specs I found out today.