Optical drive bay to hard drive bay sled or rails

Use this to fit a 3.5" hard drive into a half-height (5.25" optical drive) bay. I used dimensions from the following two standards:

3.5" disk drive:
SFF-8301: ftp://ftp.seagate.com/pub/sff/SFF-8301.PDF
5.25" optical drive
SFF-8851: ftp://ftp.seagate.com/sff/SFF-8551.PDF

You can print either a full sled with a base plate, or just rails for the sides. If you use this, please feedback. Sorry about the messy code.