In my opinion, overstocking is a great site to witness. Unless you really want to keep your Ps happy with space and for life through their adult age, then 20 per gallon is the rule. You take a great deal of risk when overstocking in a small tank, but have greater success in a tank 80-100+ gal.
Alot of members have defied the odds when overstocking. It has its pros, cons, and consequences. One pro, is that territorial disputes decrease to a minimum because of less space to try and occupy. Cons are having to get bigger and better filteration, feeding evenly, lack of space, less chance of finding a pairing match, and injuries. Just keep proper feeding routines and good water conditions and you'd be fine