Back Up Light Switch Engagement Conundrum

I'm sort of in the same boat. I had an original switch in my trans when I first got it and it's just short of turning on the lights. The lever contacts the ball on my switch, but if I take my hand off of the shifter the lights go out. I have to keep some forward pressure on the shifter to keep the lights going. Found out the switch was leaking when I rebuilt the trans, so I got a new style one hoping it would fix the problem (figured maybe the old switch was just a little worn out), but had the same problem. Thought it may have also been the shifter linkage not giving me enough throw, but I got all new linkage during the rebuild as well and still the same problem.

I thought about putting a little weld on the lever arm where it contacts the switch on the inside of the trans. I really don't think that would hurt anything, you'd only have to put a little bead on the end of it and grind it so it transitions okay when it's engaging the ball on the switch.