I happen to know that Rip, Rusty, and Nick talked about monolift attachments on Starting Strength Radio episode 273, since it was in response to a question from me. If you're a Network member, you can watch it there, otherwise the audio is available via podcast. That question starts at about the 51 minute mark.
On a selfish note, I'm curious what kind you have, Ben. I know that there are third models that are supposedly compatible with Rogue's Monster Lite setups, but I'm looking for people with direct experience with them before I decide on a model, since it 's a non-trivial expenditure.