I think it is worth also reading up on Mufti Abdullah Bin Bayas work on it. I prosume there are similar work by Maulna Madani (RAH) of Deoband. One point to remember fighi aqalia is in essense no more then applying age old edict not gaining acceptance in general by the classical scholars. I think Shaikh Ramadhan Buti also wrote something in responce to this.