We bought one of the Stewmac binding jigs.
When it first arrived it was unusable due to a lot of play in the rollers on the support stand. We fixed it with some washers and emailed Stewmac about it.
To their credit about a month later a new set of re-engineered rollers arrived in the mail unannounced.

It makes the job extremely simple with very little chance for error.

Them white plastic rollers are the offending items. We're still using the originals and have kept the new ones as spares.

Even an eejit like me can use it.

This was the day we got it so we were both keen to have a lash at it.

Bob