In my opinion, Zombor Kovacs' SlipSlider invention is the best thing to happen to the standard Richter harmonica in 125 years. Using graphics and playing demos, I show how it makes the harp easier to play and way more expressive than the old type, without losing any of its great qualities.
Now you can Make Your Own SlipSlider, or have it made for you by Expert Customisers . Info is here: https://www.brendan-power.com/SlipSlider.php