PCB Vise with Helping Hands

### PCB Vise and Helping Hands ###

This item is a modular system which I have found helpful. There are other versions of both the PCB vise and the helping hands out there, but I didn't find one with utter simplicity in mind. There are also multiple versions so that this item can easily scale. Different 'arms' may also be designed which do other custom and cool things. The ramps are designed into the arms and base so that the torque applied by the wingnut will tighten and hold the grip.

### Features ###
* Chamfered bottom edge so that parts are easily removed from the print bed
* Spiral mounts so that tightening screws tightens hold on parts
* Beveled edge on arms that will hold any PCB edge
* Center hole in bases for more solid mounting on a surface or other fixtures
* part names include the length in thousandths of an inch. For instance, 'pcb_vise_arm_1750.stl' is a model of a part 1.75" in length.
* The '3500' base can hold a PCB of up to 4.4" in one dimensio