Updated README for v0.3 development

2 oz copper is no longer needed, and neither is a thin board.

README.md

 This is the circuit board for the PD Buddy Sink, a device which aims to make
 USB Power Delivery accessible to any electronics hobbyist.
 
-The board is designed for 2 oz copper.  It's probably best to use a 1.0 or 0.8
-mm thick PCB to make sure it's possible to solder the USB connector's pins.
+The board is designed for 1 oz copper on all layers.  1.6 mm thickness should
+be fine.  Just keep in mind that it isn't possible to assemble the board with a
+soldering iron anymore!
 
 The PCB is made with [KiCad](http://kicad-pcb.org/), so you'll need that if you
-want to make any changes.
+want to make any changes.  Several PCB fabricators accept KiCad PCB files
+directly now, but if you intend to order from one that does not, you'll need
+KiCad to plot the Gerbers.
 
 PD Buddy Sink is Copyright (C) 2017 Clayton G. Hobbs, and made available under
 the CERN Open Hardware Licence v1.2.  See LICENSE for more information.