Not familiar with the kit but I did build a version of a Torchmate table several years ago from pictures they used to have on their site. The table frame was done with 3x3, 1/4 wall tube and solidly welded. I put bolts in plates at the bottom of six legs to aid leveling the machine. Then stretched welding wire to use as a straight edge to check bow and camber of the frame. Used a torch to heat spots and hit with a wet rag to work the frame into straight. Even with that the frame was capped with 1/2" x 4" CRS bar for the gantry to ride upon. That CRS bar could have been shimmed to a perfect level but seemed to come out quite flat and level. The gantry is some 80/20 extrusion in a "T" shape ridding on 1/2" cam followers for ride and holding the gantry in reference to one of the cap bars. The system uses dual racks and a driveshaft to drive the gantry through the length of the table. Only issue being the rack is exposed to potential dross getting in the teeth. Which hasn't really been much of an issue. The machine gets used to cut mainly 3/8 to 1/2" steel parts and has a table size that easily holds a 4x8 sheet of material. Used a Stepper World stepper drive system and entire cost was less than half of a Torchmate drive system.