I've had a few of the Marlin 795s (Same gun only box-magazine fed), 2 blued and one stainless.  Really decent guns for the money, last 795 I bought was @ SAIL store, $129 on sale and I think I had a $25 gift certificate too!  lol
Anyhow-I'd have 2 suggestions about these guns, first already covered-off about not over-tightening the screws..  Second would be considering an MCARBO spring kit to make the trigger a bit nicer.  I'm inclined to fling that suggestion around, but if it's not something you're comfortable doing...maybe seek the assistance of someone more experienced and/or a gunsmith.  It's a little fussier a job than most spring upgrades to triggers.