These thumbs are even nicer.
I looked at your eBay imagery.
1. Does the black cylinder come with the purchase?
2. Is the black cylinder a solid, fixed length?
3. Do you only sell via eBay?
4. Are there different size options or one size for the BX24?
I am not completely clear how the black cylinder functions in this design unless it is fixed [though it looks like it telescopes]. I assume that the bucket curls until the desired item is pinched betweem the bucket and the fixed thumb.
Thanks,
The Gardener