I just wanted to make a recommendation to orchestral players that want a massive tone with a great fundamental to try the Tomastik Spirocore Stark (or Heavy Gauge). Somehow nobody knows about them, or uses them. Al Laszlo from Cincinnati turned me on to them about ten years ago. Usually the normal orchestral and the Weich (low tension) are available, and only a few retailers carry the heavy gauge. The catalogs are not consistent in their translation of the name, some list them as Stark, others as Strong, and others as Heavy. What you should know is that they are red at the bottom like all Spirocores, but they are green at the top. Like all Tomastiks, they require a few weeks of breaking in, the first few days being quite shrill, but then get ready for some serious thunder. To make the first few days easier you may want to put some rosin straight on the strings to help the bow grab the new a somewhat stiff string. Enjoy real cojones !!!