Hey Bill,
Great plans!!! I looked them over and I didn't find any "errors" in your drawings.
They are easy to understand and worded very well.
 
I just discovered that tonight, Tuesday March 10, the Military Channel will be
showing an hour-long program on repeating crossbows. From the trailer I guess
it's mostly about Chinese ones. Their resident mad scientist is going to try to
improve on the ancient design. It looks iike (SIC) he does -- he triggers an
explosion. I think Bill has already beaten him to the punch -- simple and
effective. [chu ko nu history here]

(UK) The crossbow plans look fun but of academic interest only as they are not
sold here anymore ( Not sure if they are even legal ). They were popular when I
went to school but were soon banned at school even though the school shop sold
cigarettes to students at the time ( Much safer ). The repeater would have been
seriously cool in those innocent days. [a reminder to make sure it is legal where you live]

I would guess that Bill's chu-ko-new might be the first practical upgrade for a repeating
crossbow in 4000 years :)  
What a thought.