Well yeah it kinda does sound a little unethical, but I believe it's completely within the rules and it would be a reasonable change in order to prevent any slim chance of disqualification. I personally believe that if some part of an instrument is actually in violation of the rules and does indeed contain parts from a professional instrument, it's up to the judge to enforce that. If a judge were to be presented with a guitar made made with a guitar blank, I don't believe that they would be able to reasonably claim that a specialty guitar blank was used. Additionally, I believe that the extensive modifications required to turn guitar blanks into an actual guitar would make such a device legal based on my interpretation of the rules. However, if the words "guitar blank" were to be used in the build log, then a judge might use that as grounds to disqualify the device based on their own interpretation of the rules. Leaving out that detail would be perfectly reasonable, as it would make no difference in my own interpretation of the rules and it would protect me against possible disqualification. Feel free to disagree with me, though. I personally haven't omitted a detail like that for any competition, but I'm definitely interested in the ethics of doing so.That last sentence sounds a little unethical...You could argue that the blanks are not parts of professional instruments as they require significant modification to serve that purpose. You could also just leave out the fact that you're using blanks specifically for guitars in your documentation by just listing them as hard maple planks or something like that.Anyone know if neck or body blanks for guitars are allowed? The rules say no parts of professional instruments but I feel like they would be allowed since you have to cut them to the right size and in the right shape (especially the neck blank since its just a block of wood).