Can a 910 head be sent into Titleist to increase swingweight via rat glue injection in the head (similar to what's done during production so that all heads come out within spec with the 7g weight)? I have a 910F fairway which, given a lightweight shaft and 1/2" of shortening, comes out at C-9 with the 7g weight. I've gotten it to D-2 with the 12g weight (measured by a Top 100 fitter), and still want a tad heavier feel (to match my 910H's). I realize that small swingweight differences are generally imperceptible and this is purely mental, etc., but am wondering if it can be done.