I'm Robert MacPherson. I have built about a dozen crossbows over the years; mostly modest bows in the 150lb (70 kilo) range. Most of my bows have been based on "Gothic one-foot bows" of the high middle ages. I have also built an all steel ballistrino with a built in screw spanning mechanism. I will try to get some pics of some of my crossbows together and post them.
I feel as though I have a good understanding of what makes crossbows "tick", and am very willing to share what I know with others.
My fondest crossbow desire is to build horn and sinew composite bows, and hope that the folks here on this forum can help me overcome some of the technical hurdles.