"How does the window attach to the roller arm?"
1.) Window setting (or channel filler)
2.) Channel
3.) Regulator (pin or guide goes inside channel)

"The window sash has detached from the roller arm,"
The ends of the channel has no stops so if something fails, the arm can run off the channel.

"and the roller arm has come off the regulator."
Can't unless it is worn out or broken. Need another regulator.
Attachments
Window 01.jpg (83.16 KB, 54 downloads)
Window 02.jpg (108.17 KB, 52 downloads)


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."