Also sync improves when there is hardware monitoring. Monitoring through a mixer opposed to monitoring thorugh an audio interface and DAW. I got a pretty tight sync in Live this way and also adjusting midi clock sync delay in the preferences. Id record the tempest metranome and then ajust the sync delay. I got it tight, but then it would kinda drift out of sync after a couple of mintues. I like ableton link, but it doesnt always work for me. I think if the router has a lot of traffic that messes it up. Ive also done the adhoc network, but sometimes it doesnt work either.