To get ahold of Bandit Jedi's (Paul) awesome saber spin tutorial DVD... which includes a lot more than just what is seen on the net:SaberCombat
In addition to that, Caine & I have quite a bit going on with the SaberCombat "NCSCS" DVDs... which, although they contain some info on saberspins... aren't there to "replace" Paul's DVD. We did this out of both respect for him *AND* the idea of not "re-inventing the wheel".
The only other thing that I can say is... like many things in life, the more "complex" or "advanced" actions are simply a mixture of solid BASICS. So... for example, if you learn A and B and C all individually... "ABC" all melded together would often be considered an advanced move.
Take MA kicks for example. Basic side kick. Easy, right? Or so it would seem. :) You'd practice that for ages before it's solid and you could STILL learn more about it...
Add to it a body spin... in which case, it could become a spin back/side/thrust kick, or it could even turn into a wheel/hook, depending on your chambering, kick line, etc.
Add to it a jump... so there ya go "jump side kick" or jumping back kick...
Add to it a body spin IN THE AIR... "jumping spinning side kick" or jumping back kick.
Right there, you have a more "complex" action, but it's born ONLY of 3 basics: learning how to jump (for kick tech)... learning how to spin (either in air or on ground)... and the basic kick itself.
Do the same with saber spins... and you've got your work cut out for you. :)