Color Grading Remotely with Live Sessions

We had a tight turnaround on a documentary series and our lead colorist, based in London, couldn't fly out to our LA-based director for final grading sessions. We opted for a remote live grading solution. We used Streambox, a hardware-based encoder on our end in LA, sending a high-quality, low-latency video feed to the colorist’s Dolby reference monitor in London, while using a dedicated audio-conferencing line for real-time discussion. What worked incredibly well was the visual fidelity and responsiveness; the director truly felt like he was in the same room, making nuanced decisions on skin tones and environmental grading without compromise. What didn't work initially was managing project file versions across time zones, specifically when the colorist needed to send updated DaVinci Resolve project files back for review; we had a few instances of working off slightly older versions until we implemented a strict 'handoff' protocol using a shared cloud drive and clear communication about who 'owned' the project at any given moment. Have others found robust cloud-based alternatives to dedicated hardware for truly collaborative, low-latency live grading?