Thinking of acquiring a set of Spiro Weichs to try for orchestral playing. Been reading up on the plethora of threads, but I want to see if anyone wants to chime in directly. (Currently playing Belcantos; goal is to see what effect reducing tension on the top has on the voice of the bass.) Questions about Spiro Weich: Feel under the left hand: Are they "slippery?" Difficult to nail down notes? (i.e. Does the string tend to roll/twist under the fingers? Bow response: What stroke does it take to get the string to move/speak well? Do they respond better to bow speed vs pressure? Is it challenging to produce a hard attack at the leading edge of the note? Thanks for relating your experiences. Interested in experimenting with something new, but I want to know more about the nuances of Spiros in orchestral playing.