I decided to take my Terrus apart to polish the trigger because it was a little gritty. Anyway I put it back together and it looked just like it did when I opened it but then the gun won't cock properly. I believe the sear is not catching the cutout in the compression tube. So, when I try to cock nothing catches and it just springs back. The sear look so different from the one on my Crosman I have no idea how it could work. There is no spring to push it up and no 'hook' shape to engage the cut out. I figure I am doing something that will be obviously wrong to somebody, but I cant see it. Everybody says it easy. Haha. TIA