If he's on week 7 of 12 I would suggest obtaining a fast acting Test, such as, Prop. Add it into the cycle immediately at 75mg/ED or 100mg/EOD and run it up to PCT. Make sure proper PCT is carried out as he will already be fairly suppressed as he has run Deca only for 7 weeks. Deca is also a progestin, so running Vit-B6 200mg/ED will be a good choice, even at this late stage.