Had a go at the double coil today.....
Garden rake has exactly 1" diameter - sweet :handgestures-thumbupleft:
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Practice run with 1/4 - just straight up winding with no packing - easy done
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And then with 3/8.
I filled the pipe with water then sealed - but the end with soldering sprung a leak part way thru
Other end had a staino bolt with telfon tape and held up fine - i'll do that for both ends next time
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The inner coil has a huge kink (can see it in the last pic) so i'ma try the inner coil again next weekend
It does flow well enough but i'm sure it could be better
It will have 3/4 or 1 cold finger when i'm done - haven't decided yet - and dunno what difference there would be
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Fits well in the 3" column
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