So I have a 0,1 ambi trigger pack with a 4 position housing for my PTR91 (Specifically this one: https://www.hkparts.net/shop/pc/G3-91-PTR-Trigger-Group-4-Position-Housing-0-1-Safe-Semi-Only-106p17234.htm). Recently I noticed the ami safety has a small crack in the edge of the lever, so I was thinking of replacing it. I was at a gun show last week and saw a extended ambi 4 position burst selector lever (0,1,3,F) for a really low price. Would this selector lever fit in my 0,1 trigger pack and give me 3 positions of semi auto only? Or would this selector only fit in a 4 position trigger pack?