Bronze Corner Caps for Sink Cabinet

I noticed when the sink was placed onto its new base cabinet that the corners of the cabinet stuck out from the curved corners of the sink.

My solution was to buy some decorative bronze corner caps like this:

 Unfortunately when I test fit them this past weekend, they do not sit flush on the sides due to the way the corners of the cabinet are constructed (see first pic with side panel in corner channel)

I guess I'll have some creative grinding/milling to do on those corners first.