What happened to Mr. Fithers?!

Enjoyed the article, but was shocked that Mr. Fither's didn't have any comments! :-\  

Ken L

pensilula extensions- how to extend roadbed supports.

Another quick way to add extensions other than wood biscuits is to use pocket screws. You don't need to use glue with them and can easily be changed it track plan changes.

Helix Operation Explanation

I really liked the explanation of the operation of the helix along with the associated diagram.  It has helped me tremendously.  Thanks.