RC Brushless spindle

[routercnc]

Hi,
New motor came, but again bad news. Motor came damaged due poor packaging.

Can this be repaired? How to balance it?

Good news is that C8 ER11A 100L Collet Straight Shank Chuck Holder finally arrived,
and it`s good quality. I also ordered dial test indicator to help me in my future spindle build,
and other project... very handy tool.
Cheers!

P.S. This topic is watched (by the counter info) but it`s been a while since no one write here.
Please help me with all my doubts and questions above.
P.P.S. Those bearings from above... can they handle spindle rpm?

The reason you don't have many replies is that it's been a while since anyone has posted on building their own spindles from brushless motors.
Most of the regulars on here bought a water cooled Chinese 1.5 or 2.2 kW spindle a long time ago because they work really well and are good value. They are highly recommended.
No-one on here is holding out on you and not answering, we just don't know how to help. Sorry but I've never used Arduino, grbl, etc.