Not an issue, just a thank you!

Hi there,

The pen lift and holder are awesome! 
I was looking for inspiration for my own servo z axis and found this but decided to just take it 1:1 because you are even using the correct pen already. Luckily you can buy knockoff MGN9 Rails for less than 10€ straight off amazon now.

Ill probably add a magnetic tool changing system for multicolor prints without intervention.