This is a great reason that justifies steroids being illegal... Because every tom, dick and harry that is a teenager and hits artificial "plateaus" is going to start juicing, fuck themselves up for good, wonder why they lost so much of their gains during and after PCT, and then end up dieing at a young age either from serious health complications or suicide.
You didn't hit a plateau at 18 years old and 170 lbs, you just have no idea what you're actually doing and gained what you did from your already extremely high levels of testosterone because of your age.
You even went as far as mentioning "cell tech" like that will help you gain anything at all. If most guys mentioned cell tech on here I'd assume they were being very sarcastic, but I have a sneaking suspicion you are dead serious.