Gavin Gear of UltimateReloader.com recently tested the impressive Henderson Gen 3 (V3) Trimmer. There is a full write-up on Gavin's website, and you can watch Gavin's 18.7-minute video review below.
Henderson V3 Case Trimmer: Unboxing, Overview, Setup, Trimming – Ultimate Reloader
Henderson Precision Tri-Trim Case Trimmer Review
June « 2022 « Daily Bulletin
Daily Bulletin
GEN 3 POWERED CASE TRIMMER 115v Motor (US and Canada Only) – Henderson Precision
Henderson Case Trimmer Reviewed — Fast and VERY Repeatable « Daily Bulletin
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Henderson Precision Gen 3 Case Trimmer Part 2 Assembly
Just set up and used my Henderson case trimmer : r/reloading
Henderson V3 Case Trimmer: Unboxing, Overview, Setup, Trimming – Ultimate Reloader
June « 2022 « Daily Bulletin