CCI has an emulsion called UHV that comes in both Red and Blue. The UHV has slightly better resolution than the PHU and will outperform the PHU for less. Just make sure you process the UHV the same way by adding diazo (8 grams per gallon) and post exposing in sun or with exposure unit for extended waterbase and discharge runs.
In regards to the Multi-Tex were you using LED exposure unit ?