The added features of LEAP made things more complicated but taught me more about enclosure design. This experimentation evolved a few years later at another car stereo store where the owner purchased LEAP 4 for us to design enclosures.
I used to spend hours entering specs from the Rockford Fosgate, Kicker, MTX, Pioneer and Alpine subs we carried and would simulate hundreds of vented, bandpass and isobaric designs to learn how enclosure volume and tuning affected output and power handling. Soon after I entered the car audio industry in 1988, the shop I worked for purchased the Term-CAD enclosure design software for our DOS-based computer.