When working with remotes there are two things to always remember.
1. Newer ever rely on them to get the job done.
2. Be careful with setting things up in a popper and secure way.
One week ago, i used a "roof remote". But messed up with the focus.
So no images from the remote was sharp enough to be used.
I nailed down to what mistake i had done.
And gave it a "new shoot" today.
When it comes to rule #2, i do have a business liability insurance.
With a limit of 10 Million Swedish kronor. That's about $1,2 Million.
I would strongly argue against setting up a roof remote without a proper liability insurance. Or without proper security arrangements.
Which includes setting up and removing the gear when there is nobody on the ice/floor below.
If you drop your gear. It can seriously hurt somebody.
I secure everything with security cables.
I.E. steel wires with a loop in both ends. One wire for my "friction arm".
One for my lens. With a hose clamp around the lens.
And one for my camera body. Attached with cable ties in the mount for the camera straps.
To secure the cables, i use lockable carabineers.
The friction arm i use: https://www.manfrotto.com/variable-friction-arm
With a super clamp in one end.
To release the remote camera, i use Pocket Wizard Plus III. (Using, LR, Long range, mode).
The one on the roof remote is attached with a super clamp. Secured to a security cable with cable ties.
And, well, i could not resist the possibility to take a "remote selfie".