Lookin' good Joe, Red's tips are coming in handy already huh! That should save a lot of sanding and re-applying filler = less time taken to get the job done. Gets a little nerve wracking flipping the whole boat up, I know the feeling.
Don the GT's (150 and I would think the GT160 would be very similar) respond well to moving some weight forward, probably due to the hull design and the lack of a pad like the CVX's have. It's not just a speed thing, the ride improves a great deal overall. I can only speak with certainty on the 150, but 50-75 lbs moved forward made a big difference. I wasn't able to trim the motor up very much at all before the weight/balance change, and the bow seemed to "bounce" over the waves. I picked up a full 2 mph and more importantly a much smoother ride just adding 50 lbs of ballast in the nose of the ski locker!
Just my experience so far, there may be other factors involved as well. Sure am having a ball testing, that's all I can say for sure!