hopefully that'll kick it all back into gear long enough to finish up at around 1014 so i can bottle this weekend.
.....
i promised half of this batch to a mates housewarming, but time is running out for bottle maturation.
i'm getting nervous that i'll have to buy a few longnecks of tooeys blue and soak the labels off, just so i don't turn up empty handed!!!
Sounds like you've done about all you can now, particularly given that you've added a little bit of extra fermentable, so if it still hasn't budged by the weekend, there isn't really anything left other than bottling. You can only push it so far before theres nothing left to do, and bite the bullet and get it into bottles.
If the OG is still high, bottle in pet if at all possible. If you normally bottle in glass, do what you can in pet (even if its just a couple in softdrink bottles). Then, leave the batch at 20C, but put one of the pet bottles somewhere warmer, 25C would be good. Tilt that bottle up twice a day to keep the yeast suspended. That way, this bottle will carbonate out as quickly as possible. Check the bottle daily by squeezing it. Once it goes hard, stop tilting it. Give it another day or 2 then chill it down. When dead cold, open it, pour it, and see if it is carbonated OK, or if it is badly overcarbonated.
By force-fermenting it at the higher temperature, it should carbonate quicker, but it should still only carbonate as far as the
priming sugar allows it to. (bear in mind that forcing it to carb at a warmer temp may cause it to not taste quite as good, don't think the flavour will be a full indication of the whole batch) If the carbonation level goes beyond what the priming sugar should give it, then it shows up if there was in fact any residual sugar left in primary, and because it went off faster, it should give you time to vent the other bottles before it becomes a problem.
If the carbonation is right, or if it is undercarbed still, then the rest of the batch will be OK to leave.