Here's a start... http://www.xavax.com/efm/pcb/bassace-v1.pdf http://www.xavax.com/efm/pcb/rxcv-v1.pdf http://www.xavax.com/efm/pcb/vc-radsr-v1.pdf http://www.xavax.com/efm/pcb/vcf2f-v1.pdf Tom