Small update!
The y axis plates seems to fit well :)
Also the Z motor looks good in its spot!
Have to wait for the gantry extrusions before knowing for certain if everything is super :D

As you can see I started to paint a few parts red. Looked like utter crap so I have started to sand it off again. Have been masking all bearing and mating surfaces off but how should I preserve these from wear? Just oil heavily before final assemble?