New user needs help!

[printbus]

The heat bed with integrated relay is something new. First time anyone has mentioned that. I'd be curious to see a picture of the relay or MOSFET switch on the heat bed.

For RAMPS to work, you'd still have to connect the power supply 12v to BOTH the 5A and 11A terminals on RAMPS. The 5A connections would power the electronics, the motors, and the hot end heater. The 11A connection supplies power for the D8 circuitry used with the heat bed. Since the high current switching is happening at your heat bed, you don't need dedicated or heavy gauge wiring going to the 11A terminals. The 11A connections can be made with small gauge wire just jumpered over to the 5A terminals.

Can't help with the bed reinforcements.