I'm about to start the arduous task of learning to scrape my own reeds, I also can't cut a straight line to save my life. This little guillotine takes the guesswork out of measuring the length of the reed, or the straightness of the cut. I couldn't be happier with the results. Additionally, it's built like a small tank, with a reversible guide for EH reeds.
Reeds 'n Stuff Guillotine for Oboe and EH Reeds
For clipping the tips of oboe or English horn reeds, precise cuts, with mm scale.
The guillotine can cut reeds up to 22mm in width.