mikkeeh--If this Allem release is like the Spears i had on my BT100 it's as simple as removing a screw and the hook and it's pull again. I can't tell from the picture. Even if not it can easily be converted back by a gunsmith for probably $50 or less.
Mike's store is: Wirz Wholesale Shooting Supply, 27200 3rd St, Highland,CA, phone:909-677-7181, which is in southern California, in close proximity to Redlands Shooting Park and San Bernardino. This Stainless BT-100 is a bargain at $1850, especially for someone looking for a release trigger and a recoil system. At this price, these are no cost options. The LOP can easily be lengthened with a thicker pad. MIA is right about Mike's Street Cred. He recently went 400 straight. You'd be hard pressed to find a better guy to do business with. Bob