strength isnt infinite but neither is size you need to remeber that, size generally hasnt greater limits then strength due to genetics, its why many people can never become bodybuilders, but alot fo others can become strength trainers or powerlifters
also 5 plates on a squat and deadlift isnt huge for a steroid user like us, you can take ur lifts far beyond that with good training and diet so IMO u could easily put on more strength with gear
as for maintaining it is a another story, im currently squating and deadlifting 6 plates on each side an can tell you that after PCT my strength plumets along with my size, you need to remeber the bigger you get and further you surpass ur natural genetic potential the faster u will loose ur gains when u come off cycle
me persoanly once i started lifting over 5 plates i could never maintain my size and strength once i came off gear, it just wasnt posssible with my genetics, u most likely can be in the same boat and need to accept their is a size and strength u can never maintain without steroids
as for the Pros advice, mine is to disregard everything he says, he may be a pro which is great for him, but his genetics are probably alot better then yours and he most likely never comes off steroids, hed most liekly just cycle low and high dosages of steroids to keep getting bigger and leaner
its like looking at jay cutlers diet and workouts, u would never follow either becuase u dotn have the ability, steroids and genetics to
if your new routine isnt working for you then use something you know does,
everyone is different
with strength will come size, theirs no arguement their, u can effect the ratio strength and size are gained at by ur training style but ineveidably if you raise ur deads and squat to 6 or 7 plates i have no doubt ull be ALOT bigger
as for ur problem if your not gaining weight then its a case of eating more, its really that simple, weight gains on steroids always tend to stabalise about half way through cycle becuase blood levels of the steroids begin to stabalise so your not going to be continuosly gaining from the higher doses of steroids in ur system anymore,, but rather ur training and diet come into bigger play here
increase ur calories by another 200-300 daily for a week
if your still not gaining weight increase them again, mathematicaly u will gian weight, their is always a point of where u will gain weight