For folks interested in answer to my original post, a kind member replied re the mount he used. Here is my his response and my reply to him about new setup in the trailer, to dump the less than adequate Konka tv..
(pardon typos..he was in a hurry
This is the unit I bought.
I remove the TV and bolted the tilt head back plate to the existing swing arm. You need to drill some holes in the tilt head back plate to maxt up with the swing arm but very straight forward. You then mount the TV to the the VESA compliant holes in the new tilt head. You will need some bolts and nuts from Home Depot. I believe I used 1 inch 1/4 20 thread to mount the TV. Please check length. You need to use a lock washer and nut for th bet security.
With this head you need to set the tilt at the maximum donw angle and tighten. This work very well when viewing from the couch or the bed. If you sit at the dining table it is still a bit off angle. but this not the best view anyway.
There a othr similar mounts to choose from. The wsing arm itself is a very good product to bad it didn't include the tilt option?
SCannon - Thanks so much for the info.
ok, I got the mount, an IPS Dell 23" monitor, a HDHomerun Dual tuner networked (tiny!) tuner box. Selling the Konka for $50 to the Foreman on farm where I store the trailer... he has helped me out on hitch stuff. Hopefully installing today!
IPS monitor will have no bad angle / darkened viewing...paid $240 with taxes. here's some info:
The HDHOmerun will feed 2 signals to PC that I can record / watch / store using Win 7 Media Center as DVR softward. Home Theater on the trailer. Way cool!
What kind of drill bit did you use for monitor mount? Can you set it either way? so the 15 degree tilt will go down or up??
THX for your help!