I too would like to have a complete set, but as I'm just a hobbyist it would be really hard to defend the cost for a complete set, and buying a used set on eBay isn't much better, unfortunately!
Anyway, I have my "K & D Improved Main Spring Winder No. 128", which works for the movements I'm currently interested in (Vostok 24XX movements and Poljot 2614.2H). The tutorial I found for this K & D tool was somewhat helpful, but it has taken a lot of practice, trial and error, broken springs, and finding my own methods to get this tool to work for me. Actually, I'd like to share the experience that I've gained, but using words would just be... too wordy.
Anyway, the most important tip though (except the knowledge gained from the tutorial) would be to (I wonder if this is going to make any sense...) push the winding arbor of the tool away from the tool's barrel drum to make it easier to attach the inner mainspring coil to the winding arbor peg/pin. Then slowly pull the winding arbor, with the now attached mainspring, back into the inside of the tool's barrel drum until the mainspring touches the bottom of the drum (but not pressing on to it). At this point, tighten the two handle locking collars. That is, ignore the tutorial where it says "The winding arbor depth should be adjusted so that the spring hook is centred in the barrel".
Anyway, this is my method, and it works OK for me. It's still not easy though and I give no warranties! BTW, the winding arbor dosen't have a "spring hook" but a pin/peg, so it can be used with both left and right mainsprings, which indeed is a good thing!