passenger seat install

I've just used big screws when mounting those pedestal seat bases. never needed a toggle
 
Hi halfhitch, where did you get the non skid pattern mold?
thank you.
 
Thank you. Luckily I found a base with the cut off on one side.

I’m thinking for the 3 holes on the flat side of the pedestal base, I’ll try and go right into the stringer. The other 3 on the rounded side, I toggle those. Thoughts?

Also thanks for the sealant advice. Not sure I would have thought to do that.
I agree with that. Anytime you can get good purchase with screws, that's the best to avoid the toggle thing.