Question about Settings for TX 1 - GentleLASE

On my first treatment with GentleLASE, I was treated with 18 Joules, 15 mm - I experienced excellent shedding in the brazillian area - but did have some very small areas of hyperpigmentation (about 5% of the whole area treated, maybe less.)

Same settings were used for my underarms, although I didn’t get any hyperpigmentation there, also didn’t get as good of shedding, I’d say about 50% (versus 90% shedding in Brazilian area.)

Any thoughts on these settings? I’ve also had a touchup at 3 weeks post tx 1, and am getting another touchup (both free) in another week or so.