Final Design for the Remote Tension Lock Uncoupler

I hope this answers any questions from my previous design. I do like using knitting needles as they will not warp like dowel and they can be picked up for a song in charity/junk shops!

[@michaelchartres]

Nice one. Thanks.

[@rivendalerail6160]

Looks like a good option, can you advise the distance from the Wills Planking to the 5mm Dowel, or Knitting Needle!! as I assume this is important so as not to derail any stock.
Thank you for a simple idea on some thing I have been trying to get my head round.