Hi MickB
It may help somewhat if you stated what,,,, in particular you wish to mount/attach.
ie,,, I run two rifles each time I set up,,, with clip on thermal sights on each.
Instead of inserting the suggested batteries that only last for 4 hrs continuouse useage,,,, I use power sources from "Office Works" that will run the thermals continuosly for up to 24 hrs before a re charge is necessary.
They are slightly larger (physically) than the average mobile phone,,, and up until recently I would just lay them alongside the rifles, and attached via their 900mm long cables. (which restricts movement like standing up, or walking about)
Just recently I've purchased (2) mobile phone holders via ebay that are designed for attaching to motorbike handle bars up to 32mm diameter.
Which,,,,,, makes a perfect choice for attaching to 30mm scope tubes.
Once attached, and the cable is spiralled around the scope,,,,, it makes a self contained unit with the rifle that enables you to move freely or simply walk about.
I do not fear death itself... Only its inopportune timing!
And,,,,It's been proven,,,,, the most loving, loyal, and trustworthy females in my entire life were all canines.
Whilst in most cases ignorance should be excused,,,,,,, stupididty simply cannot.