I have a PC 690 in my router table and it has through the top height adjustment which I love. I hate the wrenches that come with this router and all routers. I use a crescent wrench on the top nut and have an offset wrench for the bottom. The wrench is a piece of you know what. If I bought a Muscle Chuck I think they are around $50 and I would need two. One for 1/4" and one for 1/2" router bits. I could be wrong about needing two. So does any one have a good fix for this?