Hi All and Sundry - I've been working on the gantry drive connection. I did not like the bracket & spacers I had. I prefer to connect to a major structural part than through a bracket. But the screw nut and gantry have different stack heights and it became difficult as metal thicknesses did not add up correctly and I hate a stack of odd plates to get to the "right" height. So I decided to make the spacer from Tertrium-S (if you do a search for it you will find it) a composite material that I make. In this way it can be machined or cast to correct thickness (15mm) . Also being composite its damp so will isolate some vibration. The last area to polish is the saddle. Also I have been looking at material costs and have decided to use 3mm zinc coated steel vs S304. Its just under 1/2 the cost of stainless so will make a difference to the final cost. I had a quote of $84AUD for one of the Z axis parts in 6mm SS and $38AUD for plain steel. These things will add up. One thing I wanted to do was have a play with laminated metal. Aircraft use it quite a bit. But I think I'll jump straight to composites, so I do the lot. Peter