First, Congratulations & Compliments on two fine Orions. The first Orion I ever played, was Keith's Custom, "Orion Nebula" mentioned upthread, and several of its features made it onto my eventual Custom.
Now, just to muddy up the water for you... there are a couple choices with 3-position Q-switches. A 0-3-6 dB, and a 0-6-9 dB. I opted for the lower values on both of my basses that have them. I find that I use the switch more on my fretless than the fretted counterpart. On the fretted one, the switch tends to stay parked in the middle (3dB) position. On a rare occasion, I may turn it to 0dB, or 6dB. I can't really explain my logic beyond, my ears tell me what I want that bass to sound like, and
right there is The Zone. On the fretless, it's often toggled to 6dB for a passage I want to be more 'present'. I sometimes play with the switch in the 0dB [OFF] position, and the filter pot
fully open. Thats a really organic sound... perfect for acoustic accompaniment. (which I do a lot of...) If there is a point to this ramble, it's that the switch gives you options. You may, or may not need all these.
With all that in mind, remember what Mica posted; you are already experiencing 8dB of boost of whatever your filters are set at. Weigh your decision on that information. Another caveat; these guys are real pros, and I am a part-time weekend warrior. Mica runs the show at Alembic, so you've already gotten plenty of advice.
Welcome to the Club. Have some fun with those basses! And post some more pictures.