Hi Ralph - Agreed you can't please everyone. That's been a common thread in developing the Tetra Motion biz. So I try to please many people so as said, there will be a non rigid tapping version (unless 750W servo is very good price which is unlikely), 750W & 1kw servo and the 1.5kW water cooled spindle for high speed freaks. Will a 750W servo with 1:2 pulley drill a 1/2" hole in steel? I use UCCNC so that's my starting position. I'm familiar with stepper set ups so that's easy I usually source steppers and drivers from stepper on line. One client is going with Buildbotics as its a one box affair. Everything is in pencil at the Mo... but a picture is emerging Peter Oh yes everyone wants a Datron... Perhaps I should do a Datson version?? My family used to have a Datsun car...Peter