Just put my xi98 on the scales -11.85oz with just the strings and original grip, so that's over 0.3oz over the TW spec. With overgrip, leather grip and a bit of lead I was actually swinging a 12.5oz racket.
I thought it swung a bit a hefty -
So I've reworked my setup a bit - 1.5g at 12, original grip and 4g at handle base - 12.2oz.
Feels pretty swift now and carries the stroke nicely, though will need some match/court time to finalize.