Looking to swap out my m4/3 cameras for Canons for higher IQ and better AF performance. Are these two cameras reliable enough for paid work? Looking for an R8 for tripod use and R7 for handheld use. I've read they seem to have overheating issues, especially the R8. Has anyone experienced this in longer recordings? And will a clip-on fan solve this? Most of my jobs are indoors, but I do get occasional outdoor press conferences during spring/summer, so upper 80s on asphalt is the worst case scenario.