Posts Made By: Terry Outcalt

Great idea, try using a threaded brass or steel insert for extra support for and stud.
Terry

Hi I thought I should get back about my my extension project. Inspired by yours, I used heavier 4" fittings and after checking the diameter of the tripod hole 2 3/8" is a much better fit.  Rather then use the stock pivot bolt I just drilled and taped a 3/8" bolt with a 3/8"id bushing and the bottom of the extension I just used the threaded hole at the back of the top plate and threaded an 8mm bolt through the bottom side extending through the top of the tripod and into an 8mm hole I'd previously drilled into the bottom of the extension.  It doesn't move, rock back and forth or pivot in any way but what it's
supposed too, whatsoever. 
All my cameras are attached to a telescope at this time so I can't take a picture. 

I used the heaviest 4" to 2" bushing type reducers, schedule 40 or better, I could find that gave me as much material, 5/8 inch, so I could to drill and tap threads into it I then pushed them into a 4" coupling. The type coupling you'd use to glue two 4" pipes together.  Try not to use the seams for your pivot points it tends to be a week spot and will break there if there any undo stress put on it threre. 

Also the outside diameter of schedule 40 2" pipe is 2 2/3" a perfect fit to add the 2 3/8 id extension that's added to the base of the AVX mount that extends into the tripod about 3/4".

For good measure I fitted a rubber gasket to the top and bottom of the extension.

Overall the original design submitted was well thought out and quite stable in my opinion when a rubber gasket was added to each end of the extension. 

All I did to mine was make it as beefy as I could.

Why did you folks shut down my account a month early? 
Terry