Rack mount adapter for Raspberry Pi B+, 2 and 3 for modular 19" 2U system with HDD

Hi community,
inspired by Krapozoks cool RasPi mount for 19" Rack, I've tried my very best to integrate an 2,5" HDD.
Win 10 3D Builder and 2 left hands left some scars on the Remix of Krapozok's Design (https://www.thingiverse.com/thing:1793758), Display-Integration of indiBITde (https://www.thingiverse.com/thing:2879686) and SSD frame from cmpunter (https://www.thingiverse.com/thing:552706) + few blocks :)
Any Remix or Reuse of this simple idea with less scars and same stability is highly w