Soon after I bought my bike I used some vacuum hose and a bolt on the end to plug my AIS elbow. Finally I got around to eliminating the elbow all together by have my brother send me some used .45 shells. It was weird, they slid right in and were loose. I put some thread lock on em because they were so loose. I decided to use black tape to thicken the shells but by the time I got the tape they were tight and couldn't budge em. I know the thread lock was still wet. What happened that they got tight...no temperature difference between bike and shells. Mystery to me.