I was at a session tonight and picked up a friend's bass. He's got Spiro Med's on E and A and unwound guts on D and G. I had my bow there and wanted to try it on the Spirocores to see if they lived down to the hype. I knew better than to try the bow on the guts. It was tough for me to get a sound out of the E string. It was pretty stiff and I just didn't get much out of it. About what I expected. Maybe if I spent some time with it. The A wasn't so bad, didn't spend a lot of time with it, it was certainly no Flexicore, but I could get some decent long tones out of it. Then just because I'm cruel to myself sometimes, I decided to pull it across the plain guts a few times (no, I don't know what brand they are). Woah! What's this? I got a nice, warm, very un-Paul Chambers like tone out of it. What? That can't be right. I bowed scales up the D and G strings into thumb position and narry a squeek or grind. I decided that the mushrooms on that pizza must have been the funny kind, because no way does unwound gut bow that nicely and you guys didn't tell me. As a matter of fact, I'm pretty sure that I had read here that it was not possible or reasonable to bow unwound gut strings. ***? Is anyone an expert on mushrooms? I don't really have any experience with things like this, but I know you guys wouldn't have lied to me about strings.