While the stock Solidoodle probably prints just fine with its OEM equipment, there’s always room for improvement. Tim thought so too. So he came up with this neat adaptation of a threadless ball screw he saw on thingiverse to fit his Solidoodle 3D Printer. I’ve heard of people complaining about the ball screw on Solidoodle printers before and people switching out the rods for acme threads but never something like this.
He made the model in OpenSCAD (3D preview here) and it uses 3 skate style bearings at an angle. The fit is real tight. Reading the thread it looks like there were some kinks in the beginning getting the step size calculated right but it looks like he has it dialed in.
More details on the Solidoodle forum thread.