I think what I'm going to do is a blend of all of these. I can see using the gutterman spools the way they show in the first link, but i can't see myself using a glue gun on a wood spool.
The second link, the links in the link itself are dead, but there's enough information in the thread itself to figure out what they did.
I have a dremel and a drill here to try with and will try both (my dremel is speed adjustable, so it may work)
Then the YouTube link shows making a somewhat larger "spool winder" using a sewing machine motor, and a shaft and rubber stoppers.
So I'm thinking for proof of concept, I'm going to get a shaft that fits through the center of the spool, and a rubber stopper for each end. I'll put that inside the chuck of the drill or dremel (depending on the width of the shaft) then try to wind the spools. If that works, I'll try to figure out how to attach the SM motor to it, and a foot for speed control...