Right now, I'll be able to change the bits using one wrench on the top side and one held on the under side. I'm thinking of a way to build in a permanently mounted spring loaded "wrench" of sorts on the underside of the top plate to engage the lower nut. Again, I don't have any plans for a bit larger than the hole diameter that I have in the top right now. If I ever do, I can disassemble the top plate and have some machine work done to it. The machine work plus the aftermarket plates is too expensive to justify for my occasional router use. I already have over $150 in the lift's parts including taps, screws, bronze bushings, aluminum plate etc.