David Schmidt

These look really good, thank you. I see they come in 6" lengths. I haven't been able to locate a price yet.

If you go here https://www.shopwagner.com/nxc/nxcli.nsf and get to the product page. Type 3372 into the search. They are only 6.95.

This might be a better solution for joining the track as you don't need to have the end notched for the set screw. You can drill two separate holes. I'm not sure if these will hold the track together as smoothly as the Modern Studio Coupler.

http://www.wagnercompanies.com/Double_Splice-Lock_Connector.aspx

Hi Steve. Does the notch have to be drilled in the middle of the two ends? Would it be the end of the world if you shifted the coupler over 1/2 inch and only had a hole in one end of the pipe? If the couple is 6 inches long I would think it will still provide enough support and a smooth enough joint.