LarryF, you're quite right. I've just tried a sneaky sample one week in and I'm pleasantly surprised.
On bottling day, I noticed a slightly sweet, cloying flavour. This I attributed to the yeast, which hadn't flocctulated that well compared to the previous brew. This is the first time I tried spray malt. I kept the fermentation identical to the previous batch except the spray malt. I had added 600g of mixed sugar (white and demerara cane) and after the initial burst of krausen, the yeast settled down. It was in the fv for two weeks and still cloudy. I think my temperature control needs rethinking to solve this problem.
Anyway, after a further week bottle conditioning, it is much improved. This is mainly to do with letting the suspended yeast do their thing for a longer time and the addition of hops during boiling of priming sugar.
I had a sneaky suspicion that my beer might underattenuate through fermentation using a larger proportion of malt. This could have been avoided (I think) by controlling draughts and by leaving the wort to ferment longer in the fv. I was not able to reverse the first, nor allow the second due to my error of drilling the airlock hole too wide on my third fermentor (soon to be bottling bucket). This I drilled using a 13mm flat bit instead of 12mm. Never mind. The compromise I made was to add more hops and let the beer ferment out more using a little less priming sugar, boiled with pellet bittering hops. I added these to a hop tea from leaf hops. After the boil and let them steep for 40-50 mins before cooling and adding to a bottling bucket. I then mixed in the contents of the fv and bottled.
The end of the batch ( that I couldn't bottle) I sampled, and it was way too sweet. I hoped the suspended yeast would take care of it, along with time in the bottles and my reduced priming solution coupled with hop additions. My gambit worked. The beer is nearly as dry as the last batch, but with a cleaner aftertaste, despite it still swimming with yeast. I suspect a further week or two will bring the fg down to 1.009 or 1.007 and make this a winner. The addition of the hops has also been noteworthy, as I stuck with ekg in both pellet and leaf and got a very nice complementary flavour. I believe ekg was used in the original hop extract in the tin so using these hops you can't go (much) wrong. It actually needs more carbonation so I may have undershot the mark long term. Here lies my process.
1 x can youngs harvest bitter
1kg light spray malt
450g white sugar
150g demerara sugar
Brought spray malt and sugar to boil, added can of extract and pitched at 20 degrees. Yeast as supplied, straight from packet. This fermented peaking at around 23 degrees the third day before I took action and covered in wet towels. Brough fermentation temperature down to 21 degrees. The fermentation temperature dropped to 19 - 20 degrees for the last week. This is when my yeast stopped floculating. I had to pull it due at 2 weeks to potential for oxidation and infection risk due to lack of air tight seal. Decided best course of action was additional hops through priming.
Priming sugar - 85g for 5 gallon batch
Priming sugar boiled with 33.3g ekg pellets for 45 mins. At flameout, left to cool and transfered to coffee cafetiere filled with 33.3g ekg leaf hops. 45min steep before plunging and leaving to cool in sink filled with cool water. brough temperature down to 26 degrees (I have infrared gizmo! :-)) and then bottle from bucket.
I wanted to give myself a frame of reference for the first test in a week of bottling so I drank some bohemian pilsner (budvar) english ale (st. Peters ipa, timothy taylors landlord) before attempting my own brew. It holds its own, in its own way. While it's certainly none of the above, with the addition of malt, hops and some educated guess work, you can make a can into a beer, and a very good one at that.
Cheers!