The Speedloader required the use of specialized strings, which were somewhat similar to Fender Bullet strings but larger, double sided, and pre-cut to determined lengths. There were issues getting this correct. Rumor has it that $200,000 worth of strings had to be thrown out due to a length miscalculation.
The pictures above show where they rested on the bridge and headstock. The headstock does not require tuners, although it’s shaped for it. You could also use these on a headless design. You could literally snap the strings into place in a matter of seconds and be ready to play after a quick fine tuning.