David,
The only thing wrong with your song is that I started the music before reading your intro...which is a great explanation but now I`m going back to have a proper, undistracted listen to the song!
I like it - yes, I got the Seekers vibe too. Your voice is fine... and I confess that until a few months ago my harmonies have been a mix of the BiaB Helicon generated with my own. Yours sound smooth and right here.
Good work and hats off to your son for the excellent mix.

Robert