Plant's are looking great. did you take clones before you dropped into flower? If not 10wks aint gonna be nothin when u gotta pop a seed in the dirt and start from scratch
The HPS/MH combo your using is fine. Theres enough threads that lead one to believe adding a MH hid into the area is beneficial since HPS is not really used by the plant for the production of chlorophyll but more for the growth of the flower. So adding a MH would tend to make you believe it would be beneficial.
I would also have to assume that using an MH during flower would also increase the amount of leaf material on your plant probably resulting in extra trimming time. (not to mention during the end of the cycle towards flush you would wan't to turn off the mh to help limit the plants production of chlorophyll).
Who knows maybe running mh/hp until close to the end of flowering then removing the MH may just send the plant into nute burning trying to catch up for the loss of the spectrum resulting in less chlorophyll & chemicals left when dry/cure process is done)
But I have no idea. just A STONED moment man
lol