Motorblock & spur gear bearing missing / incompatible

[Googliola]

During my build I was struggling with how the spur gear axis is "connected" to the motorblock. Intuitively, I wanted to fit a second, bigger bearing into that hole but my 5x16x5mm bearings I have left from my printers just would not fit. And it is not in the design files either - on purpose?
Anyway, I am going to adjust the design and increase the inner hole by 1mm to 16. Dunno if it is a bug or not intended to contain a bearing, but I will try it anyway. I think it relieves some pressure from the small bearing next to it.

[Googliola]

There is not enough space to fit a 5mm bearing. But I'm not 100% happy with the current solution. Closing for now as my suggestion is invalid.

[robaki-dev]

yes, that hole was not intended to contain a bearing. Its size was an arbitrary choice just to make some room for the spur gear.
sometimes the spur gear goes in like that: