Hi guys, A couple of years ago, I had the top section of my bass' fretboard removed so that my luthier could remove the truss rod. I had to get the truss nut replaced as it had become stripped, and my luthier worked out that it'd be quicker and cheaper to cut off a section of the fretboard rather than remove the whole thing. The neck has 24 frets, and he cut it at the 21st fret slot so that (theoretically) the neck couldn't bow 'across' the joint. I haven't had a single problem with that part of the bass since he did that work. However, last summer I accidentally left my bass in a car on a hot day, and I noticed a bit of 'ski-ramping' around that area of the fretboard. I wasn't sure if this had anything to do with the repair though, as it has previously happened on very hot days PRIOR to the truss nut removal. Either way, I simple truss rod adjustment fixed the problem. Now, I know that my luthier used Titebond Original to glue that section of the fretboard on, and these events have made me curious as to how heat-resistant the glue is. I know that Hide Glue can withstand temperatures of 80-90 degrees before it starts to soften (and even then it'll still hold a joint), but I have no idea how heat-resistant Titebond Original is. Does anyone know what temperature it starts to soften at? Could I EVER be at risk of ambient heat softening the joint to the point of failure, without an actual heating iron/pad being used? Thanks in advance for any info!