Hey @Woodpecker, hey Pony, hey all,
I share the opinion that a hand trim router as a milling motor in such a CNC machine seems like a joke and although I own a Makita RT0702C, I would never think of mounting it into our Onefinity CNC machine.
But everyone knows how a hand trim router is usually used. It is used for very short periods of time, and for small mechanical loads. If you can run your CNC machine so that these conditions are fulfilled, this is obviously the reason why many people are in fact satisfied with a hand trim router as a milling motor in their CNC machine. I would never let it run without surveillance though.
If you consider what monstrous beasts the Onefinity CNC machines are, sometimes using a hand trim router as milling motor seems to me like using a tracked loader to drive down to the bakery and transport a loaf of bread home in its bucket 
With a Onefinity machine, you could as well do things like this¹…
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- (A 4.6 kW HSD spindle on a Hitachi WJ200 VFD roughing with a 8 mm roughing bit in black locust, one of the hardest woods in Northern America, 1/2" deep at 110 ipm)