I have Jaycar Response 6.5" front door splits.

To ensure the window misses the driver in the door I'm using a 1"
spacer. The driver is screwed to the spacer and the spacer screwed to
the door trim.

I have a cup shaped insert made from sheet plastic which is siliconed
to the speaker hole in the door metal. This is to ensure the speaker
does not get wet.

Currently the door trim is only clipped to the metal of the door. Also,
there is a space (5mm-10mm) between the door trim and the metal of the
door.

Should I make a more solid connection of the driver to the door metal?

Perhaps using some long screws to mount the driver to the spacer,
through the door trim, through another spacer, and into the door metal?

Cheers.