Just been out with my HW30S, lightly polished guts, de-galled and fitted with the tinbum guide kit.
It is a truly sweet-shooting rifle, feels like something that has had a 'proper' custom shop work it over. Extremely smooth to cock and no buzz, twang or bark on discharge.
Super-accurate with a Beeman Sport aperture sight. If power is not an issue, then it's the perfick shootin' iron.