Do a search for "pushrods". Should be most of the info you need. Central Hobbies has the parts you need.

Mike

This is my preferred method for a profile where I do not need one that can be twisted for adjustment.  If you can find left hand 4-40 all thread you could make one twist adjustable.  Hard enough to find right hand at a reasonable price.  I prefer all-thread to formed ends because there is no stress on the thread from machining.  Towards the end they stress putting the pushrod in a jig like vise to keep the air pressure from pushing the ends out.  That is real.

If you can't find all-thread buy some long 4-40 or M3 metric bolts and cut off the heads.  Put the cut head into the tube.  Wrapping is easier with threaded insert since you can wrap the threads.  Use Kevlar thread.  You are not wrapping just to keep the bolt in, you are wrapping to keep the CF rod from splitting.  If you want them to be twist adjustable, I use stainless steel L/R Studs.  They are like the DuBro turnbuckles but much stronger - and cheaper - if you can wait for them to get here from China. 

There are more on YouTube, and I think Sparky has one somewhere in his series.

Ken

3/16” tube is adequate.  You can cut the tube with a Dremel disc, part no. 409 or 420.  Yes, the air pressure thing is real.  An alternative to holding the ends in is to drill a tiny hole in the tube for air to get out. Use one of those wee carbide circuit board drills you get from Harbor Freight that punctures your finger when you open the box.

Thx Howard. I have 3/16" (1/8" ID) CF rod available. Also 4-40 all treaded rod.

Is it recommended to 'roughen' the inside of the CF tube ends a bit, so the JB weld has a better bond to the all thread? The video did not show this as a step.

I was also wondering if 20# test spectra line could be used as an alternate to Kevlar thread to wrap the ends? I have a bunch of thin Spectra that I have used for flying lines on past 1/2a models.

Thanks in advance.

I have used spectra in a pinch.  Even nylon sewing thread.  Whole point is to keep the CF from delaminating or splitting.  Push pull strength is way up there, bending not so much.

ken