I built my own ring out of solid aluminum rod, reprinted cage connectors to adapt to the cage and added additional diagonal struts to reinforce the cage from rearward deflection, see my post: New SP140 V2.5 test flight - Builds - OpenPPG Community
I built my own ring out of solid aluminum rod, reprinted cage connectors to adapt to the cage and added additional diagonal struts to reinforce the cage from rearward deflection, see my post: New SP140 V2.5 test flight - Builds - OpenPPG Community