Outstanding!
That's what pond management is all about.
Here's your answers. 1) Continue your slot limit. Remove bass smaller than 16". Don't worry about taking too many. As long as you stay inside the slot, your fish won't let you overharvest them. Remember, bass will spawn, young bass will grow rapidly, and refill the slot quickly. But, keep tracking relative weights. Those weights will ultimately be your guide. As you approach, and stay, 95-105%, then consider changing the slot, or shifting to catch and release. Relative weights will be your guide. Expect relative weights to vary season to season. Before spawn, females will be quite heavy. Post spawn, their weights drop dramatically. Stay focused on the big picture.
2) Culling males won't hurt, but won't necessarily help. In 8 acres, you likely won't change the ratio of males to females by angling. But, if you catch a 16 inch female, 95% or larger than her length shows, toss her back. She may be on her way to greatness. Remember your objective....to manage the population first. Do that, and big bass follow.
Another thing...I would adjust genetics every year or two by adding known fingerlings. Genetics are integral to growing big bass, but they are long term management strategies as well. You won't see much result from genetics changes for 4-6 years. So, it's wise to enhance genetics yearly, or every other year, if your goal is giant bass.

Teach a man to grow fish...
He can teach to catch fish...