The HSN shouldn't affect idle. It passes a lot of fuel and should not pose a restriction that could affect the small amount of fuel the LSN passes.

I'd say your HSN is too lean. This is common enough when trying to compensate for a rich LSN.

This could also be causing your bogging issue.

To start, since it isn't stalling at WOT (although it might if you held it there long enough), I'd richen the HSN 1/4 turn, and then focus on tuning the LSN for the best launch. You can get the LSN close by listening to the idle for 20 seconds. It shouldn't go up or down over 20 seconds to be close. After final tuning for the best launch, it may change over a 20 second interval.

Anyway, I like the 20 second "listen for a consistent idle speed" better than the pinch test to get close.

And I have to add.....some engines are just plain weird.

Best of luck, and I'm a bit envious....I'd love to have a Tower Terror, but having to order parts from Tower isn't the best, as parts have to cross the border to get to me, and I seem to get charged way more than Tower says for those green checked replacement parts.