IIRC the "normal" centre height for a Boxford was nominally 4 1/2" (I seem to recall the actual centre height was 1/16" or 1/8" over 4 1/2" ). but 5" versions were also made. You would appear to have the latter. Have you tried contacting Boxford with the serial number ? They are still trading, having moved recently to a new factory in Elland, about 6 miles or so from the original Boxtrees Mill site in Halifax.

http://www.boxford.co.uk/boxford/

Hi

Just a thought, would it be feasable to cut the mounting block in two, fit a spacer to each side and bolt together to extend the height?

Ian

You shouldn't need to modify it.

If you have a mill or milling capabilities you could create a raising block for it as it's only a "V" way on one side, it dosent have to be "aerospace" accurate either as you have some room to manouver with the steady fingers.

Paul