God knows I am no plumber, but I have plumbed many kitchens and bathrooms over the years on renovation jobs I would get contracted to do in my business. I also designed the plumbing system for my own home and plumbed it all myself. Passed the Plumbing inspection first shot. After doing the whole house only had one joint that needed to be resweated....
Anyways, I digress.
Secrect is -- check for level across the floor in at least 4 directions. Know where any problems may exist.
Install the wax ring as per instructions or your local code.
Then, gently set the bowl on top of the ring. Rock gently until you feel the bowl no longer moving.
Here is the real important part.
Go get a cup of coffee, an adult beverage or a diet pop --- whatever. Bring a book and your beverage back to the room with the bowl.
Place suitable sized hunk of plywood or other similar material on bowl. Lower rear end to plywood and park on bowl for say 15-20 minutes.
Tighten the nuts on the bolts hand tight. Then 1 turn with a crescent wrench. Should be perfect.
This is how I have done it for 30 years or so.... never broke a bowl this way.
Anyother way, poof gone instantly
Same with the tank, install according to directions. Hand tighten the bolts. Let is sit a bit so that the gaskets form. Then tighten carefully. Seated firmly snug will be plenty tight.
Hope this helps.
George, how did I do