Now for the other side. I have never found it necessary to cut the corners off the edges of the lead-in of film. I do however bend back, against the curl, the leading 1/4 inch of film. I use Jobo, Rodinax and Patterson reels and all are trouble fee if - DRY!
As stated, it pays to keep loading a dud film till you can do it, any which way, in the dark and standing on your head!