Thanks for that link, those look pretty good and a lot less than the other places I've looked. I'll have to order s a few.
SteveH, you are welcome. My previous trial was slightly different as I was using an AC-DC converter fed from track power, still the results were less than satisfactory on the first try. One meter did last long enough to get a reading though... Worked out much better the second time. At any rate it was definitely a learning experience, luckily not too costly. I've spent more to learn less! 
