We’ve been flying quite a bit for cylinder break-in. I think we have about 12 hours on them now. Perfectly predictible every step of the way. I’m pretty sure they are technically broken in. It hasn’t used hardly any oil at all. I added a half quart recently just to keep it up at about 6.75qt, knowing that it has always blown out anything over about 6qt. I think another few hours (15-20 total) and we’ll just start flying and stop worrying about it. CHTs are definitely higher and come up much faster. I’m glad we’re doing this in the winter. I seem to remember CHTs really starting to come down and stabilize much later, around 100hrs, when the engine was new.