Wayne, Thanks for that link, very interesting design. Simple yet effective. I'm hoping I won't have to utilize that, but if there is any twisting action i'll surely use that method to fix it.
Mr.Chips, That's my old CNC machine, built originally from hobbycnc plans, if you notice that big piece of plexiglas is about the same shape as a standard hobbycnc plans. I also rebuilt the whole Z axis out of plexiglass, which was much different then the original. I'll try and post another picture of it later, and yes, I am using my old machine to help build the new machine
minisoft, Not sure if that's a question of a statement, you can see the linear slides in the pictures, they are Hiwin slides.
www.automation4less.com has more details, they are ball bearing based. My blocks have 2 scrappers on them to clean the slides before it moves over them, hope they are effective but only time will tell ehhe.
Ross