They will catch..deffo! I tend to have some that are very "lifelike" and others that are litterlu 4 white chicken feathers with a bit of sparkle. If i am hitting Pollock/Saithe or coalies then I use the lifelike ones as those fish dont have teeth. If the Macks turn up then I switch to the "cheaper2 flies as the Macks have small needle like teeth.
As for tomorrow..do you know where Cove harbour is? Better to meet there I think because the traffic arround The Thistle is a nightmare just now and its been taking me 30 minutes to just get past the place the last few nights.
Also, I finish at 4 so i was going to go straight to the harbour and have a few casts until you turned up