Originally Posted by aclark364
inception has a resurrection upgrade kit
It is not the internals themselves more of the geometry that Simon put into the ID frames than what Empire was able to do (or not do) with the milling.
If i remember correctly, comparing an ID frame to a stock Ressie, the ID has only a 3% contact patch, which translates to an smoother pull as the trigger plate does not have the ride the frame. That also means that the milling process is much more extensive, which reflects in the price.
Though, the springs and even the plate are an improvement over stock ressie, the frame is a detriment to the performance. You could possibly polish the stock plate to get a smoother plate.
So, while you could keep the frame and upgrade the internals, the true benefit is the frame itself.