i have my own system for stringing chucks that i figured out last summer,
you only need a single cord running from chuck to chuck,, no knots whatsoever.
as far as i know im the only person to use a single cord combined with the traditional and easy to make template for the drill holes. so you probably wont find this system elsewhere.
you will need a drill, and
nylon cord (and if youve got them, some needle nosed pliars)
the cord MUST be slightly thicker than half the width of the holes or it wont work.
( YOU NEED TO CLICK THEM TO SEE A LARGER IMAGE)
heres my "amazing diagram's"
step 1.

begin to thread the cord through the top hole, leave about a meter unthreaded hanging from the top hole.( we'll get to that soon)
step 2.

feed the cord in the direction of the arrows
step 3.

feed the cord back inside and around the inner block again so that the cord are tightly squashed against itself (follow arrows).
do the exact same on the other chuck too with the free end of the cord. (the meters worth of cord hanging from the top hole)
here is a descriptiononce youve done
forcing the cord through(thats where the needle nose pliars come in handy),.. the second time the cord crosses over itself you must leave a small length of cord (about 7 inches) hanging out at the end of the line, so you can adjust them properly to your prefered length by pulling and loosening it accordingly.
you should try to end up with the cord length in between the chucks at about an inch shorter than your want it.

(stay with me)
then PULL the chucks appart from eachother. if youve done this correctly and you used the right materials, the cords will tighten around the innner block of the chucks, pull until the connecting part of the cord wont stretch anymore. it should be almost perfectly the right size for you, (if not loosen it if you can and try again) when finnished just cut the exccess cord off leaving about 1 or 2 centimeters, then melt the frayed end of the nylon cord with a lighter (hot plastic burns, be carefull)
then after about 10 seconds it will have hardened and fused the strings forever. you can also use the bit of cord you cut off to burn, and drip on some melted nylon to make it extra safe,
its tricky to get used to straight away, but you'll never have to worry about the cords coming out because the force of your swings will only make them tighter and more secure!! you will now have chucks with just one cord connecting them as opposed to two or three (which sometimes seem too bulky to me) and no knots in sight! which means you wont have the bother of knots disrupting your spins.
i know its not the best set of instructions ever, but if anyones interested, the next time i re-do my cords i'll post a short clip showing you how on a cameraphone.
ive been using this method for about a year and the cords have never come loose on any of my chucks. and i view it as the best way to cord them. its not as easy... but the results are much much better if done correctly

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hope this helps whoever it can and if you need more info just ask, and i can talk you throught the trick bits!
peace out, happy chuckin.

hope this helps give veryone new ideas