After a couple more tweaks, I turned it on and left it in timed dispense mode. The magpies and jackdaws remember it as a food source (even with a slightly different enclosure) and are visiting it already.

I extended the dispense pathway tube to allow for a better fit for the mounting bracket and cleaned up the hose clamp mess by removing two of them. - now three hose clamps secure the mounting bracket and two of those also secure the platform. The fourth one below them secures the deposit assembly.

The mounting setup is improved a bit as well. You can mount it on a wall or fence with just one screw. Three adjustable feet provide additional support and levelling.

There are of course a couple more tweaks to the enclosure I want to make, but this is pretty close to final form as far as 110mm PVC goes. So it's open for business. I hope to make some progress with these birds in the coming weeks.