Hi there. I've used Rotosounds strings for quite a few years now and never had any problems with them until recently. I always liked the feel of them and found them to be reliable. However, I've now had three different problems with them, all within the last few months. In one set of RS66EL strings were two D strings and no E string. About a month afterwards I put on another new set of RS66EL strings and the entire set sounded dead after one rehearsal, where I must have been playing for only 2 hours max. There were Rotosounds strings sitting on some of my other basses that had been there for about 6 months that sounded brighter than this new set. I complained and was supplied with a replacement set which were luckily okay, and the shop were going to charge Rotosounds for this, saying that sometimes there is such a thing as a "duff set". This week I put a new set of SM66 strings on one of my basses, and as I was tuning up, noticed that the A string was totally dead. All the others were bright except for this one, so again I had to seek a replacement string. This keeps happening right before gigs and I am starting to find Rotosounds completely unreliable. Has anyone else here had any problems with Rotosounds, or am I just unlucky? I am now going to have to look for an alternative make of extra long scale strings as I don't know who else would make them so long, and regular long scale strings don't fit this particular bass (Washburn AB90), so if anyone has any suggestions, it would be appreciated. Many thanks.