SPL solid bushing install.

[SupaDoopa]

Well, everywhere I search, I get kind of shaky results. I'm assuming this part needs to be cut out and this is where the bushings install, but before I hack up a good subframe, I figured I'd ask.

Yes, I searched.

So, I cleaned out what SEEMS to be the cage but clarification without flaming would be helpful. Is this what needs to be cut out to continue the process to install the bushings or do the solids drop in and install from there? Any help would be greatly appreciated.

Picture:
http://i46.tinypic.com/2v3h860.jpg

[SupaDoopa]

Also, notice the lip at the bottom. If this DOES need to be removed, what's the simplest way you folks suggest?

[ManoNegra]

Yes, needs to be removed for SPL solids
I used a cheap $10 hacksaw from Home Depot to cut a groove on the ring
then used a chisel/punch to hammer it off after the tension was released