Sombreuil - thanks very much for the quick response, I just ordered the one you linked to! I checked it out over the weekend but needed to call them today before ordering to ensure the body of the flange was threaded high enough. I think it should work perfectly. Thanks again for taking the time to respond and post the link.

Yes, I realize that. I meant here on the Houzz site - or perhaps on the IKEA Hacker's site. It would be great to see exactly how to adjust the non-apron sink cabinet to fit an apron sink. We have to do it nonetheless, so I might take pictures and post if I can't find anything else. Our sink is not as heavy as the 30" sink inserted into into a 30" cabinet, so the framing requirements should not be as stringent. Plus, the methodology there was to combine two cabinets together.

Believe me, there are NO plumbing issues involved. What MAY be an issue is finding a hardware store--or other source--for the parts you need to do a changeover. The best thing you can do for yourself is get down and climb under your present sink, the neighbor's sink, your family member's sinks, and familiarize yourself with the plumbing that's under there !! While you're down there, check for leaks, and use a ruler/tape measure to get an idea of sizes. Bathroom sinks are usually 1 1/4" diameter thinwall pipe; the tub/shower and the kitchen sink are, or should be, 1 1/2". One thing to remember: the 1 1/2" thinwall pipe hooked directly to the bottom of your sink, and tied into the "S" or "P" traps under there, is NOT NOT NOT the same as the 1 1/2" drain piping; HOWEVER--there are adapters to mate the thinwall to the heavier piping. By the way, you ARE gonna go to the store and find out what a "P" or "S" trap is, aincha?? Dont be afraid to ask Q's, and do realize many of the guys you ask are about as ignorant as you are when it comes to plumbing....many--not all of 'em. THEN: when you find somebody who sounds like (s)he can help you do this project, and they put down on paper the parts you need, the best thing you can do is repeat the process--go find somebody else at another store who can do likewise, and then compare the parts recommended, &c. Maybe this soundz like plumbing 101--you're right, it is. Anything else spellz disaster in the making, not to mention the resultant feeling you bin ripped off and jerked around, and that you coulda done a better job yourself.... if only.... you'd taken to heart the suggestion of: kenn 1RmSchlHse millersport oHIo -- there's a time and place for spontaneity....

The 12727 has deck holes that are a 4" apart which means only a very small faucet mounting possibility. The 12700 has an 8" spread (more normal). The 12700 has a 3-5/8" drain; the 12787 has a 2-1/4" drain. The 12787 is designed to be installed on brackets and only comes in white. Installed they will not look exactly the same due to the faucet restrictions and mounting styles. If you plan to mount the utility sink on a cabinet vs brackets I would call Kohler and ask if that's possible. The notes specify installation instructions.