I have tried pretty much every rack made. Pretty much every rack has needed some tweaking to get the harmonica in the right angle and attitude to match my ambrature. The flex rack is a great step forward in rack technology. The only problem I experienced was the large nuts fell off (my fault) I always adjust it to the same angle anyway, so I replaced them with locking nuts. Set it and forget it. The harmonicas slip in easily- I slide them in from the back. The tension springs are adjustable to allow your preferencial tightness. Overall, I give this rack an 8 out of 10 stars. Good job, Hohner. Thanks for listening.