Neither the Super 7 nor the Super LS (Line Force) arehighpassed, the Neo 10's roll off naturally unless one implements an inline filter prior to the main amplifier(s).
The GRS Neo 10 will fit in the Super 7's baffle, it needs 2 of the mounting screw holes re-located however... not a huge deal.
We do have a couople customers waiting on Super 7 kits, will hopefully be cutting a sheet of baffles soon . IIRC, both these guys are using the original Neo 10's
With regards to what was mentioned above about using additional "Neo 10's", it's not likely to get you much deeper with regards to frequency, each pair you add is going to spread the acoustic centers apart, and the tweeter height is going to get out of hand so not really an option.
jay