You owe it to yourself to try it, even for weeks on end, combined with the V3. You have to, you already own it. Eventually you will feel that it adds enough to the experience to keep it or a) you don't feel the investment is worth it for one effect, or b) you feel that the V3 actually detracts from the SFX-100 experience. You'll probably only know after weeks of trying one, and then going back to the other way and trying it again fresh. You can switch between just having the V3 on or off but it doesn't really give the entire big picture for a number of reasons. Firstly is the wobble, or not even wobble but the fact that the seat is mounted on a pivot point rather than static rails. Second is the height or lack there of that you can achieve with the seat. Pushing this lower enhances the feeling with a lower COG to the actuators. Those are probably the main things.
I had to replace the bolts in my brackets so I bit the bullet and detached the seat from the platform and spend around an hour to mount it back onto the GT1 with the provided rails and angle brackets. It wasn't enough for me to turn it off, I had to try it the way it was going to be should I had decided to sell the V3. The second I jumped into the seat, it felt so much stronger and sturdier than with the V3 on. I knew then that the feedback from the actuators would be in full effect.
So a few things to note having just run a few V8 races with only actuators and no V3 at all. I feel like this type of motion allows you to drive hard, drive confidently and make use of the information available while still being in control and never feeling like the motion is 'getting in the way'. No matter how much I tuned the V3 I still needed a long time to adjust to the moving seat and with brake pitch and surge, coupled with minor adjustments in steering left or right, the seat always felt a bit on edge and produced movements that you wouldn't really feel in a car. Because the motion is coming from the actual seat, little adjustments moved you around a bit too much. Now, my arms are always at the same distance to the wheel, my feet are always at the same distance to the pedals, my hands find my shifter no matter what's happening in the cockpit. Brake pitch is nice and when I add the tensioner I think we are going to get another level of immersion that doesn't impact on the position of your body to the important instruments. With it adding a level of lateral G force as well, it will complement my new found Sway effect, which I have the chassis leaning into the corner rather than the other way around and portraying G load on the body. It feels SO right in the full motion and I know in VR at least, it's super immersive. Because it's a relatively subtle effect compared to how hard you can be thrown in the V3, it mimics the real car's movement into a turn, better than the effect you can produce by trying to achieve a G load feeling. It suits the actuators much more in my opinion. So that person in the SFX-100 thread that had the Sway going the 'inverted direction', as we all reported it, was actually correct! To me, anyway.
Overall, I feel like I get more out of the system with the actuators allowed to do their thing uninhibited. I feel like it has the potential to make me more consistent that the V3 could have, with more subtle motion cues rather than some harsh, abrupt feedback you sometimes experience in the seat mover. The nice thing is the actuators are very fast and super strong, so we still get lots of great feedback (as Henk's profiles have shown us) without things feeling slow, sluggish and out of sync with what we are seeing, which can happen with some heavy full motion chassis solutions.