Fret leveling with strings on - RECTIFY Master - fret leveling with strings on

Katana - the under string fret leveling tool — Sully Guitars®

Fret leveling with The Katana Fret Leveling System by RECTIFY Master

Katana - the under string fret leveling tool — Sully Guitars®

Spot leveling frets.

How does the action (distance between fret and string) of a guitar affect the tone/sound/timbre? - Quora

Stewmac/Matt Vinson Style Neck Jig, Page 2

R.M.KATANA RSBB - RECTIFY Master - fret leveling with strings on

Katana - the under string fret leveling tool — Sully Guitars®

R.M.LITE - fret leveling with strings on™ - Since 2010

Understanding the Options when Ordering a Fretlight Guitar – The Fretlight Guitar Store

Katana Fret Levelling System Video Overview

How does the action (distance between fret and string) of a guitar affect the tone/sound/timbre? - Quora