Quick Tension Knobs for Deltaprintr

#### What is this?
This is an easy, toolless spectra line tensioning system for the Deltaprintr. It replaces the plywood pulley mounts at the top of each tower. With this design, just home the carriages, pluck the lines, and give each knob a quick twist so they're nice and tight. No more tools, no more feats of strength required, no more worrying about lines loosening.

I've been using this design for a couple of years, and I'm pleased as punch. I started a [thread](http://forums.deltaprintr.com/index.php?threads/quick-tension-knobs.533/) on the Deltaprintr forum if you want to chat over there.

#### Why do I want it?

The original plywood slot has flaws:
- Adjustment requires tools.
- Adjustment is awkward. You need two hands to loosen the pulley and a third hand to pry up on the machine to draw the line tight. Then, _while prying_, you need to tighten it all down again.
- The only thing keeping the pulley from sliding loose is the friction between the plywood and the hardwa