I guess you could be glad you didn't have to replace the toilet, that shit gets deep and I am not talking about the directions, it's pretty self explanatory, take the spatula and remove all the old wax and shit that managed to get stuff up in there with it. Anyway, being a landlord who has had my share of replacing toilet parts you are much braver than I am. I'd just told the sales guy give me the basic most simplistic part I need. Your going to have to come back and let us know if the water savings on that half flush made it worth it. Than, and only than would I attempt such an endeavor if proven worth it. Lol.