Reversed Spring

Spring from original (https://www.thingiverse.com/thing:6344617) except the direction of the coil is reversed.

I was having problems with the regular spring and it kept breaking when the switch of the blade would be toggled on in the upward direction.

I observed that the downward motion was noticeably more study than the upward motion.

This reversed spring seems to of done the trick.

UPDATE: I noticed a small gap around the middle rod of the spring. This gap would be sliced and the model would be one layer too high. The gap is fixed and the spring should have full strength.