brilliant setup!I'm running XtreStoLite on mine
I didn't need to change bootloader or modem, I just flashed from CWM
I tried Alliance for a while but I found it very buggy and a bit sluggish, then I moved over to crDroid and that was beautiful but lacked some features (IR blaster mainly) so I moved back to TW and went for XtreStoLite and it's the best rom I've found on the S5 so far
Just flash the ROM zip in CWM then flash the addon zip as well to choose your optionsbrilliant setup!
You won't look back!!
As for battery, I too am using Ktoonz and I'm using the "Undeniable 2" profile and I can go all day (6am - midnight) and be on ~20% going to bed with around 5 hours screen time

Where's the best place to buy one of these just now please? I'm currently using an S4 with Vodafone out of commitment so would probably stay on that network and buy an S5 SIM free but also wondered if anyone had heard of any deals being offered by the Vodafone retentions team.
Thanks in advance.
Another 32mb update just appeared OTA
Took the plunge and ordered an S5 prime from S Korea. Arrived today and its amazing. Note 4 specs in an S5 size/shell with spare battery included for £360!
Works great on EE
Nicely done, my son has just broke my old n4 and would probably be interested in buying himself one of these so could you tell me which supplier ta.