Here's a few small brackets just to maybe help stiffen up the frame a little bit more. Maybe not completely necessary but I guess maybe every little but helps. The purpose of the "anchor" part is to secure the printer to the board my S5 is on top of, so if by any chance the actual entire printer was ever-so-slightly budging at all during prints, it won't now. I don't absolutely know if it was but just in case. These are testing parts.
Revised: "Right" parts added and files renamed. "Right" parts are larger and attach to frame with a bigger footprint. Not possible on left side due to the pulley bracket mount.
PLEASE NOTE: I had a mixup with dimensions and file names. Corrections have been made. The current files are correct. My apologies.
2/4/18 Update: Slightly modified hole locations on Left and Right Z Angles brackets.