it should be comfortable when u see diff between ready cheeses in same room
for ex.:
1stage done = 10%red opacity
2stage done = 20%red opacity
3stage done = 30%red opacity
4stage done = 40%red opacity
gouda = 50% red oppacity
or
1stage done = yellow
2stage done = orange
3stage done = red
4stage done = blue
gouda = black
P.S.
have a 1/2-1 barrel of sheep milk every day ,
50 cheese rack on each stage (50*4*6 low q boards),
600 cheese tray (40-80q boards),
25-50 cheeses per day after 30days from start production
(mb reduce stage time from 220hrs to 100 ?)