Vern,
Both; I don't believe they are not suited for each other. However I started my research going down the PWS element first. If they were going to retain the current PWS, then I would suggest a T&M would be more appropriate. With the FFP CLIN and the MACK truck that could drive through this PWS, there is a high level of uncertainty that would drive up my FFP price. I understand that there is risk associated with all work, yet FFP is best when risk is minimal or can be predicted with an acceptable degree of certainty.
Thank you for your time.