Sorry I did a search but couldn't find anything. Is there a difference between the two? They appear to have the same specs but the LD20 has an anti-roll design and is $5.00 more. Is that the only difference?
The main difference is the anti-roll design. The low is lower on the new series - about half of what it was on the old series - a big plus as many thought the range on the old series was too narrow.