My reply is slightly controversial but may stimulate constructive discussion, I hope.
We are rapidly approaching the time when all span-limited, non-scale, FF duration events have flat wings with tip plates. In indoor FF duration, OlBill's F1M, LPP, Science Olympiad, and A-6 models are examples.
Yes, your flights times have a good chance of increasing with tip plates. I'm unsure about any other wing fences not at the tips.
Fred Rash
Oops!
Not my A6. Maybe someday.