Looks great. Thats strange how at first you were only getting 10.8v. Was that reading from your 12v post? That doesnt make sense that it only gives out 4 amps. Mine puts out 16 amps at the 12v rail. Most power supplys give out at least 6-7 amps.

Also, I noticed the same problem with my resistor. It got really hot in only a couple of minutes. I then noticed when my PS was running my charger, the resistor only got a little warm even after a couple of hours. The resistors only get hot when nothing is pluged into the PS.