Well, it turns out the yellow xenon strobe I bought online is smaller than my former strobe, and not as bright. But it's still a great attention-getter. It came in the mail yesterday and I hooked it into the system.

One thing I noticed about my homebuilt system is that if I say, "I'll just hook it up such-and-such a way temporarily, then I'll come back and finish the job later," it usually doesn't work that way. Whichever way I hook it up, it will usually stay that way for much longer than I planned, often remaining in an ugly-fied state until the next modification or until something breaks. It won't win any prizes for looks, but it's simple, effective, dependable, easily maintained and cost-effective. Did I mention it works?