anyone using Sunshine#4 ADVANCED?

Hey stated using sunshine #4 Advanced recently to try and see what a peat/coco fiber combo would be like. My biggest question with using this medium is what Ph would one use? I use Adv Nutrients and have always used 6.3 in soil and 5.8-6.0 in coco. My attempts at coco always seemed to have yellowing with the whole cal mag thing( use RO water and add 150-200ppm calmag with coco, 100ppm calmag with soil) Anyway right now im using 100ppm calmag and running my ph at 6.0, they seem to be fine but now im seeing some fluctuation. Talked with someone at Sungro(who make sunshine) and they really didnt have a good answer about it...joy.
My thoughts are the coco/peat mix my plants would have the benefits of both but the fact is that there really isnt alot of coco in this stuff...like 30% tops...dont think ill use it again being that it was more expensive and i needed like 4 more bails then what i usually need with plain sunshine #4. Extra compressed means more work while they save money on shipping. Anyway looking for some imput. Cheers

anyone?

one more time....