[Ken Smith]

Have you measured the diameter of all these various Strings? To me, the difference is much smaller than the Bow movement and the arch of the Bridge is the most important for me with this issue. I have used over a dozen combinations and brands and see no difference in crossing as long as the string bows well.

What kind of Bass and Bow grade wise are you using and what is your Bow/Classical training background or level of playing with the Bow? Trying to fix something with a String is not the way to go when it's a technique. What one pro likes another may hate. I have seen some great players cross strings with ease in fast passages with nothing special altered in the string department.

Wanna talk about Gut type/Gut core strings? Ok, but have someone tune the Bass as you are playing because they don't stay in tune for long. This is why Gut is OUT and Steel/Metal is IN! A few 'die-hards' out there still mess with this but it's a minority, trust me.

For instance, the written Cadenza in the Dragonetti Concerto. It crosses 3 strings fast as lightening playing various triplet lines. The 2nd and 4th movement of Beethoven's 9th, moves like a shooting star with crossing strings. What do I play it with string wise? Who cares, whatever string I like that day on that Bass. It has zip to do with the strings as long as the Bass has fairly even tensioned Strings, proper shaped Fingerboard/Bridge match, you have a decent Bass that responds well, a good Bow and the technique to pull off the Job both right and left hands. There is no quick fix here as far as a String goes that will short cut years of practice and training with an Orchestral professional.