GW is fine but MK does effect your test level (well it effects my animals).
Couple of people on other forums got blood test of their animals and their research indicated that 25mg of MK effects their animals test level also.
I would recommend CJC and GHRP for PCT because they have been shown to help the recovery of LH level and the GH releases form it helps with keeping the fat on and it will help you keep more of your gains.