Just noticed in another post that, apparently, the , and . keys in TMO are disabled for the external camera 'hopping' I described. I wasn't aware of that. As I'm on full-realism and have been for some time I haven't been able to verify this.
It definitely works in stock. The other post has a fix for TMO to re-enable the , and . keys. See the post titled "follow along camera".
Apologies if this caused some confusion and/or frustration.
