Yes, you're right of course, a brilliant product.
But although I have used it with great success in the past, the components do have to held very precisely in a seep proof jig as it has a very searching nature and will all run out of a tiny pinprick hole, I know this because the first time I used it, I had a frantic time catching it with a spoon and putting back in the top until it started to set..:sweat:
Each end would have to be jigged and cast separately and alignment could be tricky, this would mean mixing two batches out of one tin (if one tin is enough for both), the measuring has to be very precise as small differences in the amount of catalyst produces very different strength/hardness qualities of rubber. There is also a metal to rubber primer/adhesive to be bought.
I don't mean to sound defeatist here, and not suggesting a second rate fix, just passing on experience, I have no doubt it could be done, but it is show season now and I feel that if this job was left until winter it would be better.