Focus in on a particular section of your proposal or feasibility report that is giving you difficulty. Why is this particular section proving problematic? What, specifically, seems to be the issue? Are the criteria for your feasibility report questionable? Does the budget for your proposal not seem realistic? Etc.
Once you’ve identified the primary issue, contemplate some questions for your workshop group. Overall, what do you most want feedback on? How can you direct their readings to enable you to make the best revisions possible?