yes that was what i had in mind.They do have horizontal holes but i am going to have to get the parts made for me so flat plates may be easier. i was wondering if i could bolt it directly but the holes are right on the edge of the slots so it would only be going properly through the very middle of the extrushion.

i have not chosen any steppers yet but was just wondering if i was going to need a reduction with belts and pulley that i plan on the top or wether normally it is just 1 to 1. the plan is to use a 2.2kw spindle and then there will be the weight of what is in the picture and what ever stepper i use.