I bought a set of aluminum adjustment wheels on e-bay, and I'd like to install them myself. Money is tight, you know.... I have decent wood-working skills, so I think it may be possible. My bridge is very low now, so I plan on marking it so that I cut out a space for the wheels that at their lowest leave the action where it is, but will allow me to raise it. I will be very careful about making sure that the holes are drilled parallel to each other and perpendicular to the top of the bass. From what I've seen, they are usually installed with the threads up, right? Any suggestions or hints would be welcome. I know I should take it to a luthier, but I would love to try it myself. Thanks in advance.