[TCML] primary coils

[bartb]

Yeah, I do the same except to add a vertical cut in the bottom of each 
hole to give it some flexibility for each rib (especially if using 
something hard such as acrylic). Something like this:
http://www.classictesla.com/temp/Pristand.gif

Take care,
Bart

sheelite at aol.com wrote:
>  
>
> Another suggestion on primary supports/copper tubing:
> I've built all of my primary supports the same way, and I find it works great.  I drill 'holes' in the high-density polyethylene supports (exact dia as the copper tubing) such that the center of the hole is slightly below the surface of the support.  This forms a slot with a slightly smaller entrance width.   The primary copper tubing will 'snap' securely into the slot (loading the support from the coil of copper tubing from the center out-word - total process takes only minutes.)  No 'cap' to the support is needed.  You can practice on a scrap to determine the best depth of the 'hole'.
> If a slot is lose, you can use a dab of hot-glue.  One could also use an occasional zip-tie (around the tube and thru a hole in the support) for extra security.
>
> =
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