Hello,
I am new to Makerfarm printers and this forum. I am almost done building my 12" i3v but have a few questions.

First is the heated bed wiring. I have the bed with the built in relay, the thick black power wires I have hooked up to V+ and COM on my power supply. The thin wires are connected to D8 on the RAMPS board. However, when I plug in the power supply, the RAMPS board doesn't turn on. On my other printers I have always run wires from the power supply to the two terminal blocks on the board, but as far as I can tell, the only two connections made on the power supply are to the heated bed.

Second is the bed reinforcements. These are only used on the 12", so the documentation on how to attach them is a bit sparse. I think they are supposed to face down towards the base of the printer when the bed is on the extrusions, but this setup limits my y axis build volume by about 8cm.

Thanks for any advice you can give me!