At driver length it's about 1.6 grams for each swing weight.I’d need to consult the full specs but I think the simply way is to butt trim 1” (might be 1.25”) and go to 18/6 weights to bring the swing weight back up.
If someone doesn’t confirm before, I’ll double check my math when I get back home this afternoon.
Generally each quarter inch is about 1.5 swing weight points.
The 6 gram weight is out of stock right now on the cobra site but is supposed to be back in stock in 2 weeks or so.
My head right now has an 18 and 2 weight and I'm planning on trying either a 14 and 10 or 18 and 10 when I trim mine a bit.