The intonation on my Ibanez premium SR 5 string bass with the MR5S bridge is a real pain in the A. I took it to a reputable tech, had a new setup, new set of Roto 66's put on, got it home, let it acclimate for a few hours, checked the tuning, intonation, with a Peterson Strobo Stomp HD, played lightly for about an hour before the B and E strings intonation went out. The ADG strings were pretty rock solid then they eventually went out . Tried micro adjusting the intonation screws, nothing. Went on the internet, it seems there's been a history of tuning/ intonation problems with their mono rail bridge's. Somewhere, maybe here, someone said the bridges are set too far back from the neck. I called Ibanez and they said try longer intonation screws, or a different mono rail bridge system. I don't think longer intonation screws in the MR5S, is going to help. The saddles are already at the forward end of their travels, they wouldn't fit, or will be hanging out the back end. I bought this bass for the great neck, the Nord singles, and the 16.5 mm string spacing. Now I have to decide whether to get a Schaller 3D5 bass bridge that's adjustable, it has 16.5 mm spacing, or look for an adjustable mono rail bass bridge, that's similar to the MR5S, but with longer intonation screws. If I go the mono rail system route, I'll probably need a bass plate to cover up at least some of the screw holes left over from the MR5S. I really like this bass, I want to keep it, just want to solve the problem and bring the frustration level way down. Please feel free to offer any suggestions, that worked for you, or think will solve this problem. It will be greatly appreciated. Thanks to everyone in advance.