Today what U say as reverse engineered ( world calls it assembled- to reverse engineer a product U have to have few copies of that before...and if U can get few copies from N Korea, U can get many copies too...may be in parts.) products were hailed as pakistani developments few years ago.
Few years down the time, u and the world will call , today missile development as, reverse engineered/assembled. Have patience, truth will prevail.
When AQ Khan is famous / infamous for it's clandestine nuclear programme, how and why should they take the time & money consuming hard work to "develop" missile. They always have the fruitful example of nuclear programme behind them.
Names may change yesterday KRL, today NESCOM..tomorrow something else.But to develop a system it takes years of countinuity...the exact reason APJ was called from ISRO to DRDO. ( Please read wings of Fire). Prior to him DRDO too was doing what pakistan is doing today...making a reverse engineered missile -Devil .
Anyway, I can bring horse to the water, but can not make it drink.