Mini-Lathe 555 Motor Tool Post Grinder!

So a while back I designed this (see more here: https://www.thingiverse.com/thing:3423036) Quick Change Tool Post Grinder and promised a 555 Motor basted version and here it is! It uses a 555 Motor (see more here:http://diy3dtech.com/mabuchi-555-12v-dc-hobby-motors/ ) with a small chuck (see more here: https://www.amazon.com/0-5-3-2mm-Electric-Motor-Collet-M7-2-3mm/dp/B07NC57NZR/ref=as_li_ss_tl?keywords=555+motor+chuck&qid=1552258468&s=gateway&sr=8-31&linkCode=sl1&tag=diy3dtech-20&linkId=5ed06