Any users? I have a pretty new Swingmaster and I am hoping to improve the volume. I had a set of Obligatos on it, sounded great, no volume. Put on some Corelli 370's Great for bowing, good volume, to darn thin. Using Spirocore Solos, Best volume, nice to finger, kind of noisy under the bow. My teacher is bowing the same strings and I can bow them with no problem but his are also about 8 years old. Any views?