Yep, like others said, it drops right in. Don't touch the mounting ring at all, just the retaining ring that holds it in. Swap the wire harness and you're done. It took me 10 minutes, and it was in a poorly lit and cold garage. FYI, they can be found on eBay for $225 or less.
No they don't make the reflector style Daymaker. I still think that one is a rebranded Trucklite Phase 7. Though some say it is not.
I don't believe the the reflector Daymaker is a rebranded TruckLite phase 7. The only reason I say that is because the HD reflector sits flush, the TL does not requiring a deeper trim ring. Now they may very well manufacture it for them, but they are not the same light.