sdandrea1 I demo'd (again) a G SFT last Wednesday It's almost as reliably straight as the G400 Max. I actually owned one last year for a while and I remember struggling with the counter-weighted shaft. I'd like little more swingweight/head feel.
The G400 SFT has a lighter head (203 grams / D1) compared to the G400 (206 gram / D3). I just got some Ping screw weights from The Golfworks and replaced the 10 gram weight with a 13 gram weight. The 3 extra grams should get me another ~ 1.5 swing weight points. It does feel slightly heavier.
So, I'd go that route rather than adding lead tape. The weight will be on the black rubbery grommet under the metal outer part. I'd check it before ordering a weight just to make sure.