Microswitch operating force

I wanna try microswitch probing with my 3d printer but since you cnc guys better than us at precision i think asking here would be better. Anyways so my printer uses 2 motors(parallel/1 driver) for z axis and it uses lead screw(4 channel) and for bearing it has poor POM wheel that grips profile, does operating force change accuracy? Like 20gf or 250gf would it make accuracy difference? Also does price make any accuracy? I can afford max 10 if it makes difference but same then around 5 dollar. Thanks