DSLR Gimbal Alternative to Gremsy

I need a decent gimbal for my Lumix S5IIx, Gremsy T3 is far too expensive and too weak with 1.7kg payload!

Optimal would be DJI RS 3 Mini, only 800g and can over 2kg payload!

How can I control the gimbal with CuberOrange? Are there cheap alternatives, such as Weebill 3s or are larger DJI gimbals supported?