that's a good suggestion T-mar. Most adapters I have seen are tapered, you'll have to find a straight one and use a stem shim for this to work and look more seemless I think. I think that if you use a straight adapter with a shim you can put a spacer between the stem and lock-nut and it will look more better also. I think that trying to eliminate the lock-nut will be difficult since you will have to bascially weight the adapter while you tighten it and that will be hard since you tighten it from the top.