How to have multiple gmail calendars sync on a BB and on your gmail account

I don't know if this is something that has been already posted but I thought I d share.

I have two gmail accounts, one for business, one for friends and family.
I have one calendar per account.

I shared the friends and family calendar with the business account and selected the manage events options, which allows me to control the friends and family cal from the business account.

I have both gmail on my 9900, and I activated both calendar sync as well. In that way, I have on my 9900, the two cal that sync with my gmail in two colors, and on my business gmail, the two calendars in two colors.

This sort of goes around the limitations that you can only sync one calendar on BB with one account.

Hope this helps.