I think Steve @sk66 might be your man to answer this.......he as I recall did that with at least one gimbal in the past year or so.
I've had mines for a few years and it's been great.I might just return this gimbal head and get a lens master, only heard good things!
Thanks
Chilt
It is 3/8th standard fitting and yes it would be flush if the adapter was used as it fits into a slight recess .What thread size is it? My tripod had I think the smaller 3/8 thread? If I need an adaptor will it still be flush with the tripod you recon?