nothing wrong with 3h2gos and v4. I’ve used them loads and loads and loads and loads. 6 screen spans, 4 x 1080p spans, 6 x 720p, 3 screen spans, 2 screen spans. Love using them in fact because graphics card doesn’t know or care if you’re plugging or unplugging projectors into the 3h2gos.
Don’t be scared off from trying with them again if you’ve had a bad experience.