I think the magnet you are reffering to is this one :

from here http://www.supermagnetman.net/index.php?cPath=41&page=3 its the R1410. However it is on the chassis not on the sub-platter. The magnets are held in CNC machined acrylic disks, though both the material used and the specific implementation have changed on my final design.

sq225917, after our listening session tonight I would respond by saying that your system may (and I only say may) sound more integrated but then it also sounds way less dynamic both in terms of micro and macro senses and I suspect this is the reason you hear greater 'integration' - it does indeed sound better with the light weight clamp though . I'm yet to be convinced that the Kef's produce the range of dynamic inflection I expect (though they are tonaly well integrated); I am indeed very 'Flat earth' in my audio priorities. Looking forward to hearing your system with a better cartridge - not that wowed by your Rega.