If you did have a LMB spawn in Early Summer '16, and those 'new' LMB frye grew to 10" in about 8 months or so, than you have accomplished that growth cycle twice.
From June '15 to June-ish '16, the initial LMB stockers grew to at least 10-12" in about (12) months, and spawned.
From June-ish '16 to February '17, you're already at 10" and it's only been (8) months.
I'd want to see more before doing anything major.
What else would you want to see?
Im not going to kill the lake off, but it looks like I am going to be restocking bluegill (1" - 3") as well as some threadfin shad over the next few weeks.