Update 2014.11.19: Added files (V2) with adjusted dimensions for improved performanceThis design consists of 3 parts: a bracket that mounts to the x-axis, replacing the wooden hardware, a nut trap that is free to slide along x-axis bracket, and a piece to hold the z-rods vertically.Parts are optimized for printing at 0.3mm layer height. Suggested 25% infill and printing in heat resistant materials such as ABS, nylon, or PETInstallation:1. hold motor shaft with a pair of pliers and remove rod from plastic tubing connecting motors to z-rods.2. lift x-axis and remove z-rods.3. unscrew t-slot bolts on wood piece with nut trap for z-rods and replace with printed z-iso_bracket4. slide z-iso_nut_trap onto nut on z-rod and thread z-rod through slot on z-iso_bracket.5. Repeat step 4 for 2nd z-rod6. Reattach z-rods to z-motors using plastic tubing7. Remove bolt at top of z-axis linear rail (this attaches z-rail to top of wood frame)8. Install z-iso_rodfix by threading z-rod through hole and attach to wood frame using bolt removed in step 7.9. Repeat step 8 for 2nd z-rod.