For a more advanced user, this is fine. If you come off everything between cycles, this would be a hard one to recover from. Deca and tren shut you down hard. If you are doing a PCT and coming off after, I would hit HCG through the cycle. 250-500iu, 2x wk through the cycle would help.Also, be careful during the period that you come off deca and switch to Tren. At this time, there may be a more intense overlap. You should be good. As the tren builds, the deca is tapering down in your blood levels. But I just want you to be aware that you could have issues around that time. If you find it’s too much, just hold tight. Stop the tren until the deca clears more. Really though, you should be fine