Very cool
When you see what looks like tip fall off to one side, it is either the uppers being relatively too loose (on the high side as you look up), or the intermediates being relatively too tight. Sounds like you made the right adjustment.
Keep in mind the rig setting which is ideal in say, 15 knots of breeze, may be too tight for the lighter stuff. It sounds like you are on the snug side, and you might want to go 2-3 turns looser on the uppers and 1.5-2 turns looser on the intermediates/lowers for under 10 knots. For sure you want to ease the backstay (in your case with the turnbuckle) in light air to sag off the headstay more-this will help you point in lighter air and create a more powerful genoa.
In your case, I would suggest (regardless of whether you use different settings for the uppers in different condition) you adjust the forward and aft lowers for the conditions. On breezy days go to the bendier shape by easing the aft lowers and taking up the same amount on the fwd lowers, and in light air do the reverse to straighten the mast and make the main fuller..
I was curious about your topping lift comment: what you are getting at?
Glad you are having fun!
Cheers!