I recently received the custom printed circuit boards I had made by OSH Park!
This one is for a 6x voltage multiplier based on circuits I studied online. Since it's a test unit I included screw terminals so I don't have to solder to use it. For the version that goes inside an actual amp chassis I will design another slightly smaller one with solder pads.
After designing it I created the board layout in Eagle. OSH made it so easy, too. No need to generate all the various gerber layers, just upload the ".brd" file and they do all that and show you nifty previews to check over before finalizing the order! They are now going to be my fab house for the indefinite future. :)