Thanks all for responses. I decided not go back to "cheapo" international shipping.
Sounds like the best choice, I don't worry much but I'd be nervous trying to ship your components under 5mm. Even if the contents didn't suffer any damage the perception of some buyers might not be favourable.
Reminds me of a buyer of a 7" single who complained about my shoddy packaging (adding that the record was totally perfect on arrival).
I told him I had sent out over 5,000 singles in the same packaging without a single report of damage but he still insisted the packaging was deficient!

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915
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