Veyon (iTalc Replacement)
iTalc was a great piece of software that allowed you to remote view computer screens, control them, etc. It was a BEAR to setup. Now, it has been replaced with Veyon (veyon.io) and the new software supports silent parameters. It's also free. Is it possible that PDQ could start creating deployments for it? I've attached the Veyon Admin manual for you to peruse...free to download from their website.
Software is free, and Veyon allows silent install parameters (where iTalc did not).