I've given the solution a bit more thought and decided on the following:
Buy another TT RGB Riing 12 fan bringing the total to 15 (one spare). The main reason for the purchase is to get another included TT controller bringing that total to 7. This will enable me to control the RGB lighting in banks of 2 as I am using an even number of fans in the various areas throughout the X9 case. Think of the dancefloor in Saturday Night Fever as a reference (although reference to the dancefloor in a certain Steve Martin film from 1979 may be more appropriate in my case).
In order to power and control the fans I will run a few from the motherboard but plug the bulk into the psu which has a USB link for software control. The psu specs state 11 x molex which are enabled via 3 included cables containing molex connectors along their length (2 cables with 4 connectors and one with 3 connectors). There are actually 6 x peripheral/sata sockets on the rear of the psu, any of which could be utilised to provide power.
Finally I will add 3 x Phobya 8 x 4-Pin Splitter PWM hubs (see picture) which will draw power from the 3 molex cables included with the psu. Spare capacity on the TT controllers and fan splitter hubs will give me contingency in the unlikely event that one of the units fail.
There's plenty of room to stash the controllers out of sight in the case but that would be a hassle when I want to change the colours which is the whole point and main selling feature of these unique fans. I will therefore route the cables to the controllers which will be outside the case. it's not the most elegant solution but it will work. Thermaltake are working on a sync cable at present and TtAlvin has kindly stated that these will be forwarded when they become available, which will be much appreciated. If it's a daisy chain arrangement i think I bettter update my requirement to 6 cables.
I haven't seen this arrangement online as yet so hopefully it will be worth the effort.
My wishlist for the future would be dedicated touchscreen controllers like the Thermaltake Commander FT Controller, however with additional lighting control and a handheld remote. No pressure guys but if the demand was there, the supply would surely follow. Nothing would come close to this refined solution in my opinion and I reckon that Thermaltake would sell plenty more fans. I bet that they would like all their customers (who choose air cooling route with an X9 case) to buy 16 fans in addition to the 2 included units with the case (even if they aren't necessary). I think I've hoovered up most of the local supply in my area.
If you really want to go over the top (hey, why not?), add sound activation to the lighting for when you are playing your favourite tunes!
Please feel free to add your views. Any comments would be appreciated. I will add a picture of the build in due course.
Thanks