use 800x600 in 50Hz setup on th64 c64 core options in vga menu + single buffering.
Great picture like the BenQ BL702A, just bigger and with HDMI input.
The first device was unfortunately defective and the workmanship is better at Benq.
Let it (TC 2) also run with your setting (800x600 50hz ... ) .
Can be used as a retro and home office monitor at the same time.
That is a big point.