Hi John

Plans have been updated. have applied my options for installation. refer to details 1 and 2 . but as long as you follow AS timber framing guides you can do it as to builders' way. . Please note the measurements on my opening for D1 and W1 need to be confirmed before ordering after you prepare everything for the installation. The window schedule seems 10mm off mine.

feel free to call me on 0409782247 Steven