It seems 60/40 lead tin solder and soldering to bullet connectors the weakest link. The bullet connectors I have seen require in effect the wire to be loosely fitting susspended in solder. Additional solder is required for larger and looser connectors, adding to the affect of additional resistance in the joint.
Does anyone know of any other system used to tightly screw or crimp etc in R/C boats?
Another thought, has anyone actually simulated and tested a setup . say applying many amps on a bench and checked with thermometer various sizes etc. (i.e a bit more scientifically)?.