Best Material for Primary Coil Supports

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Original poster: "Mccauley, Daniel H by way of Terry Fritz <twftesla-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>


I'm looking for a material to use for my pancake primary coil supports.   In
your experience what works best, in that its easy to machine and work with,
and has good dielectric properties:

So far I was looking at:

PVC
High Dense Polyethylene

Thanks
Dan