Sync refine off in the handset means sync is set to align
You can’t turn sync totally off in the handset, but if you use the original 10M driver you can turn it totally off in the driver if you want to do that. (this assumes you use the 10M driver for everything as it’s done by the driver)
Per’s model maker probably turns sync refine on if it’s set to off.
The same is done by modelcreator, i suggest you use that when modelling instead of model maker because it’s very outdated