is there a way to set the delay to triplets?
I checked this out this morning. With sync on, a rate of 22 is the closest to exact triplets of the sync-selected note, but you can dial in a better value between 22 and 23 with the gold parameter knobs.
Needless to say, this could be a lot more convenient, but depending on what you want to do, maybe it's good enough.
Correction: after stepping away I realized dotted 8th notes and triplet 8th notes should be in opposite directions from straight 8th notes (rate=25). Between 22 and 23 is triplets of the next note bigger than the sync-selected note (e.g., set sync to 16th notes, dial in 22<rate<23, you get triplet 8th notes). Based on a quick do-over, I think near-perfect triplets of the sync-selected note is just a nudge down from 29. (So use the select knob to choose 29, then nudge the gold knob for delay time down by a tiny bit. The display will still show 29. If it changes to 28, you've gone too far.)
There's no direct setting to sync with any triplet timing (neither any dotted notes), but the sync and rate settings will combine to give you predictable results that adjust with tempo.
To my ear the sweet spot for dotted notes is a rate of 21. (25 is straight to the selected sync note timing.)
Hopefully there's a sweet (enough) spot for triplets too.