re: Tug boat puzzle

You sublimating recruits for the puzzle movement C125?

All that's missing are the plans for us dumbcoffs!

If I read it correct, you should make the ends of those port dowels rounded like the removable one.

This could be a perfect project for crowieand his charities...  filled with lollies, could be a great prize.
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The plans might be in that link I sent you a long time ago LBD. 
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Thank you Alex for the honourable mention and yes please, if available I’d surely appreciate a copy of the plan sir!