Hi Spumco - Yes I'm looking at rear mounted motors (or reflex them with belts) and other ways to combine spaces now the general layout is done. This is intended as a production machine so won't be "breaking" moulds. Moulds will be fibreglass. I'd like to use Hiwin linear drives but they haven't got back to me with prices I made a patient lifter in a hospital once and left the screw end free. After being used for a while they decided they wanted it to lift faster so I cranked up the inverter a bit and the free end wobbled terribly and the nut whined in unison Luckily there was a spot for a support bearing. So I'll have bearings both ends as good practice... Peter