Minimal firmware for Air2S?

Hi !
I’m still running 02.02.2040 on my Air2S for the wifi hack and I’m pretty reluctant to upgrade and lose the little signal « oumph » it offers in some cases.
Is there any drawback using an older firmware with Litchi, if it works at all ? (I read about gimbal issues, but seem more linked to SDK problems on iOS)

Thanks
J