I wanted to mount the C270 on the print bed but couldn't find a good mount for the Wanhao Duplicator i3 / Monoprice Maker Select / Cocoon Create.
You may want to print an extra arm that extends the camera a bit out to give full coverage of the print bed.
The bed mount uses M3 bolts and nuts to secure it to the print bed but this may not be necessary depending on how tight a fit you get on the bed. I haven't used any and it holds perfectly.
If you make one, please post pics!
You should use ABS or materials with a higher glass temperature than the print you are going to be doing. I used PLA and while it does work, it is not as tight as I would like.
Print the way you see best. I have printed with supports and it worked perfectly. YMMV.
Mounted with only two arms for a small print
Printing focus ring and another arm!