Gerry...
I haven't seen a video but I found a Word DOC file (someone here in this forum pointed it out to me) that was quite useful when I rebuilt my control head. Do a google search for this title and you you'll see a link to the file.
Sidescreen Control Head-disassemble.doc
When you break yours down make sure you note the orientation of all of the small parts in the head. There are two short metal pieces with a beveled end (don't know what they're called) that need to go back in with the right way. If they are not right, the turn signal lever function won't work right. I'm sure you can figure out how I know that. Taking it all back a part is a pain.
Rick...