I've been talking to Todd for quite a while now (I am the one who started that Myarmoury thread) He has done very interesting work but is limited in how far he can take his customers weapons by liability and other factors, and doesn't have any more historical sources than I do (at least than I am aware of) and we still aren't sure about the weight of the bolts. What needs to happen is for Royal Armouries or someone to commisssion a study and hire him to make some really strong prods for that and test them with sensors and against different targets.
In the meantime I'm interested in anythnig anyone else is doing, and still looking for good data on crossbows, notably the late medievel stachel type; crossbow bolts (particularly their weight) and anybody else who may be out there, in Eastern Europe, Italy, North America wherever, who is doing experimental archeology or tests on this similar to what Leo has been doing.
"In the case of an ailing social order, the absence of an adequate diagnosis... is a crucial, perhaps decisive part of the disease." -Zygmunt Bauman
"With any luck we'll be in Stalingrad by winter. " - Anyonymous German soldier