TMK, yes. If you want to have bigger LMB, then you need to be removing a lot of LMB.

This may not be a small task with your lake being 50 acres.

You may be looking to take out at least 30-50 LMB, say under 14", per acre. That's 1,500 to 2,500 LMB!!! Depending on the amount of actual overpopulation of LMB, that number could go higher than 50 LMB/acre. Also consider that each year, how many more thousands of LMB will be born and end up surviving?

Keep in mind, I don't know all the details of your pond's
ecosystem, nor am I educationally qualified to make recommendations.

With a lake of that size, I wonder if some higher line predators might be interesting. Maybe some tiger muskie seeing as they don't spawn.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."