Hey Jim, when you say double brummels, do you mean regular brummels or locking brummels? Does the rope pass through itself a total of 4 times per eye and the tails then have a tapered crossover too?
If I were going to hang on that every day I'd either make another and have it break tested in the fashion that you're loading it, or I'd have a real short machine stitched i2i cord made.