Converting it to use triangular kinematics will improve accuracy as well. This can be done a number of ways but right now the most economic ideas appear to be using a ring and rollers or using a set of linkages. You can make either solution yourself or you could buy a kit. There is not yet a ring/roller kit that I am aware of but there is a linkage kit.
This is a really long thread but there are loads of really great ideas here: Throwing my hat in the sled modification ring
Also there’s lots more information about linkages here: Linkage kits are now available! 🎉