I never got HM FAP working right even with the new paper type specifically for this paper. I started a long string in here in February about it and the last time I tried it the humidity was fine (it was less than 20% when I 1st got the printer). Others have had good luck with it but it buckles badly, you can see this looking into the paper path so I assume it's marginal and some people are just lucky (or I'm just unlucky). HP did send a tech round who checked the calibration of my printer head height, so I know it's on target. I've switched to HP Pro Satin and Red River Ultra Pro Satin since then.
There is no more/less ink control on this printer within the canned profiles, you can adjust the head height but if you're using the new Pearl paper type it is already set to high.
I also had problems with one of my heads photo black I think, but a manual wet clean sorted it out.
Mike