Supporter - Granular Control

Hi,

Is there any way to add a little more control to Supporter? The lack of levels is making it hard for us to accomplish what we want.

We don't want to offer free blogs...just paid blogs with a free trial period. This is fairly easy to accomplish in Supporter. However, during the free trial, we don't want users to have the full Supporter disk space quota. We worry about abuse from some of the free trial users.

Is there any way (even with a custom tweak or something) that we can offer a free trial but with a limited quota?

Thanks.