I have been following this thread with most earnest but it seems to have gone overboard.
I can tell you that I have purchased no less then 4 general combo ratcheting wrench sets in metric sizes from Harbor Freight (I have 4 mechanics that work with me) and all of them have performed flawlessly over the last year +
This is the set
https://www.harborfreight.com/7-piec...set-95552.html
It only short coming is that it does not include a 9mm size but otherwise has been invaluable,m it does include 8, 10,12,13,14,15,& 17mm sizes

I ordered 4 9mm combo ratcheting wrench to compliment the set from ebay and they also work great at $2.99 each
and it can be had for under $20 with a coupon rather then it's $24.99 advertised price.
These were purchased specifically for repairing modern bikes which I know was not the OP's criteria