Mast is a great cutting agent. Currently I’m running it during my cut. It will leave you nice and dry and give that grainy look. As far as dosages I introduced Mast to my stack at a low dose of 250 a week. But I will be increasing it to 525mg next week when my cut goes into full swing. The reason I started low was to see the effect it would have on my hairline, but I think GH helped me alot in that department because I noticed zero thinning of hair. As far as primo I never ran it I guess because of cost, but after summer I will give it a go for the first time. Sorry can’t help you with that compound. May I ask what your current stats are and what you are running currently? How do you respond the Tren? Also orals are nice to put a finishing touch before you step on stage or walk on to the beach or whatever it maybe. My current cut stack is 525 Tren, 250 Mast ,increasing to 525, Test P is at 525 but will be dropping it down to 325 when I raise Mast next week, 4iu GH, 10iu slin but removing it next week also. I will also finish off with Winstrol for 4 weeks before I head for vacation. I might also drop Tren last week and throw in Anadrol to really fill out my muscle bellies and give me a nice round look.