So I've been reading through all the threads on here and have finally decided to build my own guitar. Which I'm pretty excited about. I wanted to post here first because I thought I'd have some information that would be useful even though I've never re-fretted a guitar before. I have however been a a long time plastic aircraft model builder. One thing I learned from my dad was how to glue the seams together so they would melt together and be easily sanded. So to get to the point of why that matters here.... These. These are drafting pens. The top one works excellent for working with liquid glues and would be exceptional for gluing frets down and even with crack repair. I watched you use a razor blade and thought this would work better. You can set the space between the end of the "Drawing Pen" and dip it in the glue. It will wick up the Pen and then stay there until you mate it in the corner groove between the fret and the finger board. The glue will then wick out as you move it down the fret. You can even find them on Ebay for a decent price. I hope this will help people out.