Thanks dad, I'm sure you saved me from myself!
BTW the Blue Peter bottle rockets didn't work for me - the washing-up liquid bottles blew up with anything over about 30psi. To do real damage fizzy drinks bottles were the way to go - when I got hold of a decent pump they would take well over 100psi.
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tarka_dall Like normal dall, only a bit more spicy, Wed 28 Jun 2017, 7:31,
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