Thanks for the update and Brilliant news !!! Just keep going and you will get there, sausages, toys, play are all usefull tools to have in your armoury.
You may find that you have the odd set back, if so don't panic just go back a stage and re-inforce the training.
You could also introduce a whistle to your training, I find it very effective with my dogs as the noise carries much further than my voice would, especialy if the wind is blowing, trees rustling etc. Also their is no emotion, in the whistle it always sounds the same, so no chance they may think I have getting annoyed, worried ect.
Even though they all have a good recall, I still call them back frequently during a walk, just to continualy re-inforce the training, so they don't lapse into bad habits.
A very good and old trainer once said to me " being off lead is a privelege and not a right " if my dogs develop cloth ears, they go back on the lead and the walk is terminated. They soon learn that not responding has consequences, I say nothing, just pop the lead on and turn for home. The words have stuck with me and it has worked for me over a long number of years.
Finlay is very lucky to have an owner that is putting in the training, and it is so worthwhile as you will end up with a lovely dog who you know you can let off lead, but will also be safe. Well done !!