Thanks chaps,

not having much luck though... linearmotionbearings2008 seem to be for the US only as it shows nothing for him on the .co.uk domain so accessed via tor to ebay.com and had a look but sadly no 2525 ballscrews. I'm thinking rotating nut designs now on rm2510 which seems to be readily available but could do with finding someone setup to knock them out. any ideas anyone? Johnathan doesn't seem to be about anymore.

cheers