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Printer Caret setup example

This is a machine I had devised for automated and semi-automated printing of ships.
Instead of using lots of pistons for moving a huge welder array - it moves the projection along the guiding rail with only one piston.
Length of the ship can be any.
The caret moves 1 block forward or backward.

IF you have a requirement of using as few PCU and special blocks as possible - this will do great for you.

Operation manual is laid out on the rail part of the example rail structure.

WARNING - Requires safezone with damage disabled to function safely!!!

Feedback and suggestions are more than welcome!