Brace high question [/align][hr]

Ok guys and gals

I finally have everything together to start tuning my bow, my specs

bow....
Ben Pearson Mach One 7052
37514-20 (not sure what this is)
AMO-52"
45# - 28"
USA

that is exactly what is written/printed on the bow

my arrows are Patriot Heatseekers 45/60
4" feathers / shield cut
7" wraps
spine rating is 0.435 @28"
0.244 ID
0.2885 OD
6.98 GPI
I have 100 grain brass inserts, and the standard aluminum inserts but have the brass ones in for now
shooting 125gr field point, also have 100gr and 85gr on hand, for tuning purposes (trying to get some heavier ones as well, like 140/160)

My draw length on my compound is 28"
I just put a brand new Dacron(B-50) string and mufflers on this bow.
I measured the brace height without any additional twists in the string, just as it came to me and it is exactly 8"....

now I know I need to tune the brace height before I can tune anything else and that I need to break in the string, I am planning on heading out to our range/club on tuesday night and hoping to set the brace height and break in the string,

My real question here is How do I know where the brace height needs to be????

thanks in advance
Randy[/align]