Configure Default Free Level Pro Sites

Hi everyone, I've spent some time reading through existing posts on the forum but can't find a specific answer to my problem.

I know that there is a free level included automatically in Pro Sites, but there is no way to configure the 'Page Quota' options for this level in Pro Sites > Settings > Post/Page Quota.

I'm also unable to find a way to use the Pricing Tables / Feature Table settings to display a comparison between my 'Free' plan and my 'Pro' plan - is there a workaround for this or something I'm missing?

For example, I'd like to limit my 'Free' plan to just 5 pages and set the max. storage space to 500MB.