I have the Joyo Ultimate Drive as well. At first I didn't get along with it, but after playing around with it again I love it. Similar settings to you. DSL50 on clean channel with gain at 3 o'clock. Always set it there if using pedal gain to make it sound more natural. Just at the point of a little breakup. Pedal gain at 9 o'clock, tone at 1-2 o'clock, at volume at unity. I'll push the gain past 1 o'clock if I want a fuzzy distortion.