Before the first official Trax product (June 1981), Vittore Baroni and Piermario Ciani's initial plan for the publishing project was to name each release/publication Trax (followed by date and title - like, "TRAX 0681 XACT" for the first collection of graphics), but with Trux as publisher/record label.
The idea was abandoned for being too confusing, but the magazines 100% and 50%, published I think in March 81 (thus the 0381 on label), came with the Trux imprint (Hideaway is just the name of the sub-label of Materiali Sonori who pressed the record for them), and at least one Trax product (Notterossa, 0682 - june 1982) comes with both Trax and Trux indications.