T4 used w/ ipa and mod GRF1-29 questions...

I have been running the ipa/mod grf1-29 for 8 weeks now as well as test prop and tren A. This is my last week of the prop and tren and will be starting PCT next week. I though in some T4 (100mcg) starting last week to help lean me out and it has been doing a good job at that. I am going to continue to run the t4 though this week but was thinking it might be wise to discontinue its' use during PCT, as my man goal during PCT will to be to hold on to gains as my endogenous test levels recover. Does this sound like a good idea? Thought about picking back up the T4 after PCT as I plan on running the peptides for a long while.