Click image for larger version.  Name: stepper drives top.jpg  Views: 335  Size: 426.7 KB  ID: 3606Click image for larger version.  Name: speed control.jpg  Views: 328  Size: 368.6 KB  ID: 3605I have hard a good look at the circuits in Click image for larger version.  Name: Tool change PSU.jpg  Views: 362  Size: 324.0 KB  ID: 3604the back of the Starmill. I can't be certain but out of the two types of drive on that Denford link you posted, the sd range looks closest.
Click image for larger version.  Name: stepper drives.jpg  Views: 348  Size: 337.1 KB  ID: 3603 I have attached a few pics. On one of the motor boards- PKS Digiplan '87.

The Spindle board is- Jay Electrical DC speed control JE124/1 seriClick image for larger version.  Name: connectors.jpg  Views: 338  Size: 435.7 KB  ID: 3602al 98712407

The tool change psu 122ve.

I have received parts from Maplin to make buffer but haven't got a clue where to connect up. Phil.Click image for larger version.  Name: Tool Change.jpg  Views: 336  Size: 406.1 KB  ID: 3601