One more thought here. If you are tensioning your wheels to full with no tire on, then measuring after putting a tire on and find that the tension has slackened, then tensioned it back up to max again, the next time you take the tire off your spokes will be massively overtensioned. I experienced this with a tubeless tire that was such a tight fit that the tension dropped a lot, so I tightened the spokes back up and ended up eventually destroying the rim in exactly this way.