Hi Umpum,
Actually I'm not going to be much help here but I'll share what I have tried and what works best for me. I must say I've never tried Cannabrex but I will give it a try; always looking for improvements.

As I mentioned in a previous post; There is (probably tons) of different ways to cook cannabis. I used to use the recipe that sickpup45 used (post # 166) but it took alot more weed to get to the same place that 4-5 capsules do n ow. And I've been using capsules for years.......don't really smoke anymore PLUS I think slow cooking overnight has had the best result for me.
(in crockpot....temps approx 225F.)