Check out our You tube vids under blues creek to learn more on guitar making. This machine works by keeping the cutter parallel to the sides. The base unit holds the body and can be adjusted to maintain the critical position so the cutter can be in the proper position.This is a stable machine and take the variability out of the binding process. The ridgid router is the perfect router for this set up , Most routers only have 1 contact point to square things up , this has 2 bolts and all adjustments are on the front and easy for precise adjustment. If you want to take your building to the next level this is the machine for you. I recommend the lmi binding set for the best results. The carriage base is included. I back all I sell. The item "Guitar Binding machine with Ridgid router included A binder that really works" is in sale since Friday, October 12, 2012. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Guitar Builder/Luthier Supply". The seller is "tippie53" and is located in Hegins, Pennsylvania. This item can be shipped worldwide.