I think it will bring closure for you. You & the vet did all you could for him. It is never ever easy letting them go, he was such a lucky boy to have you as his owners
I hope that these answers give you some measure of peace that you did everything possible for Ollie, and in the end, made the best decision for him. Hugs to you!
Thank you MR it is getting a litte easier day by day accepting that he was in fact a ticking time bomb and that yes we did everything we possibly could for him but nothing was going to change the very sad outcome.