Not long ago someone posted pics of a "shelf" that mounted to the ROPS as a base for a tool box. I think it might work equally well for a chain saw - just bungee it on. The ROPS mounted self - from the pics - or from the site - could be mounted in a number of different configurations. I can't recall the name of the mfgr.
I found the link re the ROPS mounted tool box ledge/shelf - might work for some chain saws with some modifications. The shelf seems a bit narrow - so would need to attach a platform on top - not perfect but doable.
My issue is little tractor with a backhoe. I don't want it in the way and I have already mounted mirrors and ammo boxes for chain storage, etc. on my FEL towers and the cute little Kubota stowage box on the ROPS. Running out of real estate. Might have to be ROPS mounted on the opposite side.
I like the kolpin utv saw press as well. I have mounted several places but the best for me has been on the ROPS when it is folded down. I can take the saw out and fold it up when needed without removing the press. That won't work with a cab, but the nice thing about the press is you can pretty much mount it anywhere you want and it holds the saw safe and secure.
I built one a while back for my little skidder. I am a cheapskate on stuff like this so I used 2 scraps of rough sawn 2x8 and 2 wooden stakes. Only took about 10 minutes to screw it together and lag it to the boom. Cost was $0 as I had this stuff laying around.
Making videos has been a hobby of mine for long time, roadhunter.
For example, long before YouTube existed, I was having fun with video. Here is a video that endlessly looped as a background in the menu to a DVD that I passed out to my friends covering our track season in 2005.