I just picked up a Lyman Great Plains rifle. I am curious if there is a reasonably easy way to change where the flint strikes the frizzen. It sparks good but hits about 1/2 way down. I am used to Siler locks and they strike much higher. Also this gun shoots quit accurately but the trigger is terrible. I do not have a scale but can say it really takes a lot of effort on the rear trigger to engage the set trigger. Can I lighten this rather than replace it?