A new version of the pin connector.

A new rewritten version of the pin connector. I don't like reinventing the wheel, but I felt the need to rewrite this because I needed a few more variable parameters and couldn't easily see where to make the changes in the original code. It just does simple double ended pins - no holes etc.

It is a customizable thing.

You can vary the following parameters:

// The total length of the pin.
pin_length = 67;
// The radius of the pin shaft.
pin_radius = 3.5;
// The length of the head of the pin.
pin_head_length = 4;
// The lip around the pin head. This is the bit that grips the sides of the pin hole.
pin_head_lip = 0.6;
// The length of the slot on the pin.
slot_length = 10;
// The width of the slot in the pin.
slot_width = 2;
// The number of sides of the pin shaft and pin head.
sides = 30;
// The fractional flattening of the shaft. For example with a pin shaft radius of 5mm, then 0.1 puts 0.5mm deep flats on the pin.
flat = 0.2;