When mids are heavier than standards, you notice, I did anyway...same with ACE lows (44s), I thought ooh that hollow pin, yeah, nope. Still heavy compared to indy/thunder/royal/etc.
8.375/149 forged mids all day yesterday and had no issues with weight...tho I am dropping down to 144 forged mids, 149s are just feeling clunky coming off the af1 44s (and 148s before them).
Mid forged hollow: 376
Forged hollows: 358
Paying a 18g cost for no real added benefit in terms of grind clearance (3mm of difference on the forged mids, which I *do* notice, so the trade of is fine). But compared to a standard/hollow the mids don't net you clearance for the cost.
Kingpins are heavy, it's just the way it is. There's got to be a reason Royal/indy/krux all use the same button/hex solid pin in conjunction with the shaft nut. either cost or durability (maybe a hollow wouldn't fair so well in said shaft nut).
I'll say this tho, the mids geo feel different, better to me than forged ti..the turn is faster and def less tippy feeling.