An update on my pimping activities with a bit more detail as to steps I took to get what I ended up with:
I made it up short to 17.5 litres: kit extract in the fermenter (22 litre bucket) along with a couple of kettles-full of hot water and added 1kg Wilko Geordie Beer Kit Enhancer. OG was 1.058
Yeast calcs suggested in the region of 19-25g yeast
I had been let down by ParcelFarce so I had to go with what I had on hand which was: Wilko English Ale yeast (11g) plus two other kit yeasts in the fridge that came with a Belgian Tripel and the Wilko Stout yeast itself : (~6g each)
I added them all together and rehydrated them in 150ml water at 24 deg C for 15 mins (23g total yeast). The yeast was in a clean and sanitised wine glass, covered by a sanitised piece of cling film.
Pitched into the wort at about 22 deg C and used an electric hand blender to aerate
I fitted the lid, along with a sanitised airlock containing sanitiser and put in room @ 19 degrees. Temp on the FV is running 22 deg, so after 12 hours moved into the garage @ 16 deg. Temp on FV now 20 deg. Fermented for just over 2 weeks at about 20 degs. I ended up with a FG 1.010 (6.3%?)
I wanted a straight stout, a choc stout, a vanilla stout and a choc and vanilla stout, so I split the batches into secondary fermenters: 4 lit plain, 6 lit choc, 6 lit vanilla and then later took 2 lit each from the choc and vanilla to make the mixed C&V batch.
I got my additions info from a couple of different sources which I have since lost but this was my method:
Chocolate:
The original guide called for 6 us fl oz vodka and 3 oz cacao nibs for 10 US gal which I worked out as 177ml and 86 grams respectively for 37 litres. After doing all the maths, I ended up with 28ml vodka and 14.5 g nibs for 6 litres. And then after 24 hours I didn't feel it was chocolate-y enough, so I added another 50% making 45ml vodka and 23g nibs. I swished this around for a couple of days and then put in the freezer to take the 'butter' off. In the end, there was no butter to take off. I added this to the sec. ferm. for 5 days.
Vanilla:
Original recipe called for 2 - 3 bean pods per 5 US gal = 18.9 litres, which works out to 0.6 - 0.9 beans per 6 litres which equates to just under 1 tblsp of paste per 6 litres. I steeped this in vodka for a couple of days and then added to the sec. ferm. for 4 days.
The result.
From a additional flavour point of view - there is little, if any difference between the plain, choc, vanilla or C&V, so not sure where I went wrong. All in all, pretty disappointing to be honest.
In terms of the brew itself.... It's ok in small doses - but it feels thin (having read up i think this is the brewing it short and the high ABV)
There is quite a 'taste' and not one that I personally like. It's a bit astringent. Not sure if that's the blend of random yeast that I used, especially since I used a Belgian yeast or the amount, or something else.
I hope that helps others one way or another and I open myself up for your combined wisdom.
Cheers