Looks good. When you print the cable chain, make sure you have them in different orientations on the print bed. I printed all mine in the same direction, and there is a twist to them over the 3 feet of chain.
You probably also want a box for the ramps with a fan.
I haven’t looked in the MPCNC3DP much, but how do you level the bed? Do you have some kind of adjustment on the bed, or do you mill a space for it, or do you have to get the feet the perfect height (which will be really hard with stacked 2x4s).