I'm building a VM still, and I would really like to ask some last minute questions, before I start cutting the
expensive parts. Other comments are also greatly appreciated.
Here's a crude drawing of my design (made in mspaint

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My questions correspond with the numbers in the picture.
1) Distance between top of take-off and the reflux-condenser. My notes say this should be about 50mm, is this correct?
2) Distance between top of packing and take-off. Should there be any?
3) Packing height. I've calculated 51mm (inner diameter) * 24 = 1224mm packing height. Is this correct? Will it hurt to use more, or is it just a waste?
4) Distance between top of boiler and bottom of packing. Does this even matter?
5) Drop before product condenser. How long should this part be?
thanks for your help,
Henri