V7 load balance different bandwidths

Hello,

I´ve just migrated to v7 and am experiencing problems with some of the routes for ecmp.
I have two ISPs with different bandwidths and want to load balance.
On v6 I had multiple gateways on the same route, and two other routes for mangled traffic (via ISP1 and via ISP2)

I couldn´t find any example of how to achieve this on v7. Is there an example of a different bandwidth balance?

Thank you all in advance

Is this achievable ?