Pinning won't improve the structural integrity of the joint. But it does allow one to achieve exactly repeatable config relative to the dry fit, which is it's purpose. Best medicine for a strong joint is good mating of all the parts.... and/or a gap filling glue. TB is not the best for gap filling, in fact poor in my experience relative to URAC or epoxy. URAC may not be practical for small jobs, being expensive for what amount you need and does have a shelf life, although I'd consider it generous. Same trouble with epoxy, but it's more widely available and in smaller quantity at, for example, your local home center. I also use a W, versus a Z. Can't see any reason not too, and it adds 25% to the bonding surface essentially for free.