The outdoor lighting xfmrs usually have pretty high wattage, lots of power! If the voltage matches the LEDs you are using it would probably be ok, but I would break the output down into several circuits and add fuses and/or other protection according to the loads you end up with.
I don't know much about the Tech 3 other than it's an MRC which is a reputable brand, IMO. It also looks newer and would probably be fine for some things around your layout. I have no idea what voltage/wattage it puts out though or if it's AC or DC? Protection is still a priority I think, don't want any mishaps, shorts, fires, etc.
Leo, Hang in there, I have trouble keeping up too. We can lag behind together. I've even had to go back and reread a thread or two every now and then. And, if it makes you feel any better, I think I knew what Mike had for switches at one time, but I have totally forgotten now. One of those reread situations...
