Which object is best fit for a (clock synced) midi loop-player?

I've tried [seq] but am encountering some strange quirks;

On exporting midi files from Logic, it appears that only files exported at 120BPM will playback correctly using a [start -1] message then sending (midi)ticks.

[seq] appears to glitch at the beginning of the midi file, sending the second note (too)soon after the first, before timing stabilizes. In my case, using short 1 bar loops becomes very sloppy.

Here's the guts of the patch i had in mind. Hopefully i'm doing something wrong.