no such thing as recpetor downgrade, you come off you loose gains, you keep on you keep them, you increase you grow
now you will only ever grow to a certain point, you can try and abuse and see where you go, but common sense on 'normal' doses should tell you where your at... if you dont stand out on gym rat dosage, you wont cut it as a superhuman pro, no matter what you do
now what you will find after a long time in the game, you can keep alot of mass from using very low doses, you would have a hard time building that size on such doses, but you can play with gear after so long, without pushing it and causing major health problems