Ordered 10 full-panel boards with ENIG finish from Seeed on 2014-11-29, but will not arrive until late December to mid January for testing.  Trace FSR is in the same footprint used to mount two 1.5" FSRs, so should be able to stick 2/4 proper FSRs on top of each board and solder to the pads on the back if the DIY FSR does not live up to expectations.  Trace FSR is 0.75mm wide spaced 1.5mm on center with two 0.35mm vias in center two 'fingers' of the FSR.