Lou: In the relatively short time I've been collecting and shooting Lee Enfields I've run into a few where the forend was obviously an off the shelf replacement shoehorned onto the rifle by someone with no knowledge of how it should be done. The material is all here on this forum to troubleshoot your rifle and fix that trigger pull. Be very patient and study everything Capt. Laidlerand others have posted on the subject of forend fitment and you will sort it out. You could try installing the forend without the collar to see if that affects the trigger pull and then check out threads about how to adjust collar length if that seems to make a difference. in any case, what better to be doing over the Christmas holiday than working on your No. 4.
Ridolpho