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I just contacted WLL regarding parts availability and they told me that they have all the parts. In particularly, the burr set is $50, the gears are $11 each, and the sticky base replacement is $20.

I plan to get it from them as there is no tax as at Amazon.com. Shipping is free for orders over $50.

I was concerned about parts due to the negative reviews especially those regarding the sticky base material. Evidently the sticky base material is not very robust if you can believe a review.

I was concerned about the gear cost because I plan to experiment with powering it with a cordless drill and the gears are vinyl or plastic not steel.