On the original HUM page, the particular model of Stoundtank pedal that Tim used was never specified. Going by my brief experience with a couple of those pedals back in the late 90s, and factoring in the relatively few Soundtank distortion options available at the time along with this simple fan's casual impression of the usage within the context of HUM, it seemed like the PL5 Powerlead was a good match. In later years it seems possible, if not just as likely, that the CM5 Classic Metal (maybe, if it offered enough gain) or TM5 Thrash Metal pedals - considering what was available from Ibanez during the Astronaut days - could have served for the needs of Tim & HUM.

I imagine Tim would have wanted a distortion pedal / tone that would cut through the mix, accounting for the wall of sound from Jeff and Matt, while complementing the more midranged, foggy drone of Matt's DF-2, plus his bottom heavy, darker toned Orange amps contrasting the brighter, cleaner sounding HIWATTs with greater headroom.

Additionally, HUM was actively touring and on the road, probably wanting gear they could replace relatively easily and cheaply, from what was likely to be found in the myriad local music shops of the time, should it break down. Although the initial run of Soundtanks had metal enclosures, I remember the later / more widely available second run being housed in plastic enclosures that felt kinda cheap and flimsy, even in a hobbyist, bedroom rocker setting.