All done.
Will post photos later for reference.

Changes made by Toyota to the designs
1. Filler cap. The new filler cap does not have the filter mesh anymore. Also, it is easier to separate from the black housing.
And the filter cap was really designed to let air in easily. I tested it by sucking/blowing on the cap. but it is hard for the air to go out. i think it really designed this way so the evaporated gasoline cant easily get out but it will be easy to let air in.

2. the new tank has a flange mount on where the tubes are connected.