I have a Shapeoko 3 standard size with the the Carbide3D router. I’ve made some minor modifications including the installation of a JTech laser. Otherwise it’s pretty much stock.
The unit has been stored vertically in a closet for the last two years. The storage direction has the X-Axis at the bottom nearest the ground. I’m finally creating a workspace in the attic and I want to bring it back online.
If you’ve got any suspicions once you start it up, it might be worth checking you get a consistent belt tension across all three axes to tell you the belts are still in good order. When they age the belts lose their ability to consistently hold tension under their preload extension.
There’s some hints on measuring belt tension here if you need to: