Input controls Webi Setting User Security in CMC

Input controls appear to be a very useful to add to reports. However we are struggling with a security issue in allowing feature access to users. Our security is designed to allow report users to run reports only and only a small number of writers and editors can update or change the contents of reports.

We have tried almost very control in the CMC but cannot seem to allow users to access input control without assigning them edit rights which are also sufficient rights to substantially edit the output of report, to reformat the layout and remove data from the views. We would like to set this up so users could filter the report output using the input control without being able to edit other elements of the report.

Can any one advise how this could be achieved in CMC security please