If there is not one video on YouTube of this, Then it is new my friends.
A wheel may have been around for thousands of years but it only came into use when one guy showed it to another guy.
Behold my friends the Sliderless Slider system
Invented by XXXmags and brought to you by me.
No more will you have cranks that shift around like crazy
No more will you be worried about spazzing or have to put on ropes to stop shifting
One constraint per piston, Two if you count the rope.
Don’t forget to like!