Will this tool cut a chase horizontally across a wall at the top within the allowable 150mm safety zone or is this tool too big, how far from the edge of tool are the blades?
Depends on the model number. Some have the blades in the middle, smaller ones have thd bkades on one side with the motor on the other.
There are lots of videos that will give you a clue, like this.
Or phone Hilti support.
PS. these things aren’t light!!. Not so bad cutting a vertical chase as you are using the weight to enable the cut.
If you doing horizontal, suggest you fix a batten to rest the chaser on and to give you a guide.
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