Thank you for replys. I would like to answer to you that this case design is only for 3D print version. Milling and 3D printing have 2 completly different aproach. So this is designed so I can get the best print result, and all these 3D sufraces are there for a reason, to be strong enough as the hold ballbearings and load of the shafts. So its more of the ratio for added material where its needed, and again not to much so I dont wait too long for it to print out. So its function over fashion
Milling version will have only streight cut gears, and much simpler case. But the gear ratio will stay the same.
I added a poll, maybe it could give us some results to point this the right way.