Thanks for the replies so far thats a great help, to be honest they are all names that have crossed my path before but its reassuring to find people whohave good experiences using them so thank you :)

Quick question Kingcreaky regarding the machining of the leadscrews I was considering doing the same think about having both ends machined but using the fk bearing supports the only problem I have is that I cannot work out from chais drawings when assembled does the leadscrew actually make contact with the face of the bearing within the housing or does it butt up against the seal outside? or is the seal wide enough to accomodate the machined portion of the screw through it ?

I figure a drawing may help here to explain what I mean if I get a load of ?????? coming back :)