Spring-loaded Cooling near a holder

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[>>>] Generating Attributions log:

[0] Thing Title : t-slot extrusion profiles
[0] Thing URL : http://www.thingiverse.com/thing:17403
[0] Thing Author : discocyborg
[0] Thing Licence : Creative Commons - Attribution - Share Alike

[1] Thing Title : Dial indicator mount for prusa
[1] Thing URL : http://www.thingiverse.com/thing:28089
[1] Thing Author : ericthepoolboy
[1] Thing Licence : Creative Commons - Attribution - Share A