Get the StewMac blade or the LMI blade? After researching, it appears the LMI blade requires 'stiffeners' as opposed to the StewMac blade, which on the website states that no stiffeners are required. ANybody have experience with either of the two and wish to comment?? Looking at all these fretboard blanks I've been accumulating is making me want to go the power tool route for slotting. My arm hurts just looking at them!