That be very normal. The sour dont make much sugaf leaf. The ghostHa22 a litle but does .ake a lot of trichome.s both do but exactly as you say more in and on the bud.
It can do a litle sweat in the end.
Your Karma's OG was the same way for me. Hardly any trich's till the last couple weeks. The one I took to 11 weeks was superb!
I have a question for ya Karma. The Josh D OG, was your Biker Kush male the one used to make those seeds? Couple of my buddies were wondering and a few members on here also. Figured might as well ask the man who would know the answer instead of just guessing.