FGear Vehicle Physics (v1.4)

Hello. - Hello.
I want my Fgear Vehicle to run on a special spherical field, so I changed the Custom Gravity value to vertical or straight up. This allowed the car to drive through walls and ceilings, but the behavior of Arcade Assist’s anti-rollover feature (Bike Helper) became erratic.
Is there a better way to use Custom Gravity and Bike Helper at the same time?
Thanks.