Never trimmed in the flare in the be1900..
If your aicraft feels heavier,means you have reached vref or lower and its time to let it touch down.
Exact same in a jet, at least the 737.
run 3 or 4 seconds of nose up trim as you close the power levers. Maybe more
Are you doing that to float like a beech?
Not the easiest machine to grease...Your mileage may vary
The struts are so good, try to grease a metroliner 3 on a regular basis,now thats work and devotion