I inserted a Hinge constraint from the leader wheel, but it’s shaking a bit.
Where can I put other constraints from the leader wheel?
Can you show the gliders on the train?
Yes, let me see below for you, just look gliders:
This is just because of gliders. Can I fix this glider to the leader wheel?
try putting one a cylinder lines up with each wheel, with those being pushed in about .05 - .01 from the rail.
Example on my chassis
Thanks, but I really want to drive with a leader wheel without shaking is so cool 
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