A single-source approach requires a lengthy justification as to why they are the single option. Manipulation of the specifications so that you believe there is

A single-source approach requires a lengthy justification as to why they are the single option. Manipulation of the specifications so that you believe there is only one option does not require this justification because it's not explicit. In fact, it's possible that you are mistaken and another vendor could win the open (not single-source) contract.