this is simaller to the tommy c carriage however i kept breaking off the bearing ears. so i decided to make one that used a vertically printed bearing holder. I did not include a belt tension-er because i have the external one on my Max. I also included adjustable ears so you set the bearing width to the exact size of your rails. i have only printed the first rendition but have included the more pleasing (and stronger version) that i worked up while the first carriage was printing. I will leave this tagged as a work in progress until test the "light" version or some one else reports that it works. NOTE: I have not mounted this yet, it prints and all the parts line up. i will update when its up and running.
let me know if anything is broken or could be improved!
UPDATE 1/25/13 : The Light carriage could not be sliced, i have uploaded a new fixed file.
UPDATE: I have now been running the first version on my Max for long enough to report that is works like a charm. Very stable. I may redesign to include a belt tentioner because I am not all the fond of the external tentioner wobbling as a adjust it causing some belt alignment issues. Of course it may be easier to just tell design the external tentioner