First: Thanks for your awnser
Well, in the meanwhile I bought some used on eBay.
As well, I bought on AliExpress some wiring, Dupont plugs, ARBG (Aqua Computer RGBpx) plugs and crimps, so I'm going to Tinker these Fans to be multi Useable on Farbwerk 360 (ARGB Controller) and QUADRO (PWM Fan Controller). Since I'm on that way all the Thermaltake Specific problems are not suitable for me. I'm not using their Controller/Software. I'm not going to use Support since I'm Tinkering on the Cables. And for your Point 4: got 3 packs for 50 bucks on eBay. Leftover Fans will be used as Vents on the desk in summer