TMT, is the new SMT
Thread Mountable Technology
I made a bunch of LED beads today after work. I found that a novel way to solder a large number of beads together at once is to use sticky tape and needles to hold the crimps and LEDs in place.
Soldering one side first, and then placing the other side works better than trying to solder both sides at once, and finally, surface tension will handle alignment problems for you if you're careful.