No mods have been done to this monitor at all.
This is my spare G08 that was in a crappy Trek convert-a-cab. The *original* monitor in that cab had an unfortunate accident the first day I owned it. The back collapsed when moving it inside and the appliance lift broke the neck. I bought this one on eBay 6-7 years ago to replace it. The chassis from the broken tube was sold.
I then bought a Trek dedicated upright and parted out the convert-a-cab since it was falling apart even more. This monitor was put on the shelf as a spare.
Somewhere I ended up with a captain's chair version too.