So, I finally replaced the original rotting zinc Gotoh 7 string TOM on my Soloist 7. The low B saddle was basically rounded off up to the notch. I was going to do the ABM bridge, but then Hipshot introduced the Tone-amatic 7: https://hipshotproducts.com/products/7-string-tone-a-matic-guitar-bridge-metric So I bought one, then spent a couple of months not putting it on. I finally bit the bullet (I hate doing intonation) and installed it. Easy as pie - it dropped right in, the allen key studs fit the existing anchors (there's only one threading for TOM7s, so that's pretty easy), and the new bridge has WAY more intonation travel than the old one. It also locks on to the posts like a TonePros, but is *way* better made than any TonePros I've seen.