Light_EDDed-
No idea on that to be honest, all my at-home grinders have been single dose.
Personally I wouldn't bother with a grinder with a hopper for home use.
They tend to retain more grounds which means you'll have some stale coffee in each shot (assuming you're having 1 or 2 per day), and any grind changes will need purging of old grounds to ensure you get a representative shot (though if you're using the same beans, this likely won't significant factor).
If you're measuring by time, you'll need to compensate in dose for any times you're adjusting the grind fineness, as a coarser grind setting will result in larger dose for a given time (and vice-versa of course).
The weight-based ones (such as the Sette 270wi) do seem to be pretty accurate, but I'd always be wary of the weighing mechanism/software being a failure point (no data to back that up of course!)
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mmccarthy
Is it worth trying to pick up a spares/repair model that comes with the doser and just swap it over?