My 2 pence worth!!
Had a original Dixon badged Boxford on my CUD, couldn't fault it apart from the price.
Have now got a clone wedge type size B/250 on a Harrison M250, brilliant with the benefit of being able to make your own tool holders, because of the wedge you have more of a tolerance when using cloned tool holders. There is a fair bit of info about wedge v piston.
Check the sizes, I think a B will be a bit big, probably an A would be better.
Richard