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There's supposed to be a new MVP released within the next month or two which includes VW and a resistance checker.
Probably a while before FT can negotiate a decent price and get their mitts on it though.

They're run as franchises so they do make their prices up. When I phoned up one local Boots, I was quoted 50p. Popped into a different Boots and they wanted £1.20 but were happy to sell them for 50p after I told them the price I was quoted. I ended up picking them up from a different local Chemist who checked how much they cost them to buy on the computer and it was £6.20 for 20 (-edit- might have been 24) and were also happy to sell them for 50p. They also gave me one extra free when I bought 10.

Thanks P

Great stuff Jen When I get the time and patience, I'll probably work on a full calculation spreadsheet in Excel or just modify one that's already available with permission from the creator.

When you get scales, get some that measure to 0.01g resolution and I'd say a maximum weight capacity of 200g. Usually to calibrate scales, you need to buy a weight or combination of weights that add up to the maximum weight capacity so if you buy 1kg scales, you'll need a 1kg weight and they aren't cheap!!

Also some of the very cheap scales aren't very good. These are the scales I use which have been surprisingly accurate for the price.  They also react much more quickly than other scales I've had.   I originally bought them for weighing coffee beans but now they have another purpose!!

www.ebay.co.uk/itm/0-01g-200g-Digital-Mini-Pocket-Jewelry-Gold-Coin-Scales-Scale-Weigh-DB-OT9902-/300915930586?pt=UK_Jewellery_Watches_JewelleryBoxes_Supplies_CA&hash=item460ffcb5da

Jen Yes, you do need to know the densities (specific gravities) for measuring by weight but you don't need to be good at maths

1ml water weighs 1g
1ml PG weighs 1.036g
1ml VG (undiluted) weighs 1.261g

All I do is use a standard calculator to convert the ml I get from a juice calculator to grammes. No need for 3 decimal places but I've just put them there as they're the book values.

As the concentrates are mainly PG based, you can just use 1ml=1.04g as you do with PG.  Any difference made by other components of the flavour are very negligible.

I've verified the densities using scales and a 100ml measuring cylinder and was 0.2% off with the VG and less with PG so the figures are accurate. If you weigh a small amount like the 1ml you mention, you won't get the same accuracy as measuring out a large amount and weighing.

If do want to use weights, it's worth getting some calibration weights and using them every now and then to make sure the scales aren't lying.

If you measure accurately by ml you'll get exactly the same result but as I mentioned earlier, this method makes it much more convenient for me, not having to use anything more than scales and nothing to wash up afterwards! 

At the moment, I mix by weight but have yet to find a calculator that gives me recipes in grammes.  I just convert ml to g using a standard calculator at the moment.

I saw Perpetua's post here with a recipe for her VC.  Looks like a spreadsheet but I may be wrong but I've checked the figures and it uses the same ml to g ratio for PG, VG and concentrates that I currently use.

allaboute-cigarettes.proboards.com/post/317317/thread

Where can I get my grubby hands on it from?!!