Report customization

Hello,

I'm currently evaluating SupportCenter Plus and I have a question about reports.
I have a special need, because I visit customers which have a maintenance contract. In these visits, I have the need to print a report of what was done (i.e. all tickets closed), with some additional custom fields and a layout similar to an invoice. This is then printed and signed by the customer confirming the tasks accomplished.
These reports should always be available for viewing by the customer anytime he wants to.

I've been looking at the reports and the customization is somehow limited, but I may be missing something, so is this possible with SupportCenter Plus?

Thanks in advance for any help given.

Regards,
paulo