For diagnostics of Avian infectious bronchitis viruses, I use an end-point RT PCR reaction, and before the RT srage I do a primer annealing stage with the target reverse primer (2uM). My queation is: If I have 2 targets, is it right to use a 1:1 mixtue of their reverse primers (2uM) instead of using rendom hexamers, in order to get better sensitivity for these two targets amplified from the same RT product?