well here goes, i'll get shot down by everyone. i went to cabair and passed all the ground school with pretty good results. yes we did use 4forces manuals officially, but i don't think i opened a single one because we were given so many handouts that the instructors wrote themselves. the ground school was excellent, and i think that cabair has now written its own manuals. they were working on it when i left groundschool. and no i don't work for them