Aw Larry, it's simple dude! I just had to replace the guts of a toilet yesterday, and always use the new 'low flow' thingy and it's a tiny one piece deal that goes in the tank--I hate those dumb tall deals with the floating hollow gasket. That is old technology.
It's easy though to replace a toliet man, When we had tile done, I replaced both toliets, dropped in new wax rings, bolted it, did the water connection and caulked it. Took about an hour, and I NEVER did it before, and never saw anyone do it either. It's weird like that about me, like its in my DNA or something... like I've done it before or something. freaky!
You'll get it man!