I'll email them today, and get some more information from James
Here's a reply i have just in now.
"These shafts are rated for 1000 ft/lbs of torque. I can also make a high
horsepower application that is $100 more per shaft and will hold up to 2000
ft/lbs of torque."
i replied with a question about weight, and also as i need an odd length shaft questions about that.