Agree 100% with Stan. If the S-P distance is off, you may have a tough time adjusting the over hang and alignment of your cartridge. Vinyl Engine is an excellent source which I used many times. BTW, the VE website can help you match your cartridge and tonearm with respect to resonant frequency. I think VE is pretty easy to surf, but if you have any questions, feel free to e mail me or post your Q here.