Hi Uurgh - firstly I'd not use wheels. Since cost is an issue I'd use round rail. Wheels need constant adjustment and you'll be unhappy with them pretty quickly. 1.5kW router is a bit heavy for such a machine get an AC 800W much lighter and smaller more appropriate for your machine size. Plus its a bit cheaper. Peter
Upgrading a machine is sort of an issue. Sure you can upgrade electronics and motors and bits and bobs but the structure is the basic DNA and if thats wrong then you have to build a new machine to "upgrade". So get your structure right for what you want to do up front. Why do you have two machines hanging off the gantry? That creates a lot of dead space on the machine. Peter