Not so much a cartridge question, rather an SL1200 hot-rod question:
Which would be a better option for modding an SL1200
a) HiFi World's version with modded RB250
http://editions.pagesuite.co.uk//_PSEDITIONS/HiFiWorld/Hi-Fi%20World/September%202007/PDFPages/Page92.pdf
http://editions.pagesuite.co.uk//_PSEDITIONS/HiFiWorld/Hi-Fi%20World/September%202007/PDFPages/Page93.pdf
http://editions.pagesuite.co.uk//_PSEDITIONS/HiFiWorld/Hi-Fi%20World/September%202007/PDFPages/Page95.pdf
http://editions.pagesuite.co.uk//_PSEDITIONS/HiFiWorld/Hi-Fi%20World/September%202007/PDFPages/Page97.pdf
OR
b) KAB SL1210 M5G with:
Fluid damper
Outboard PS
Threaded record clamp
Cardas tonearm rewire
Isonoe feet
Which would be a better option for modding an SL1200
a) HiFi World's version with modded RB250
http://editions.pagesuite.co.uk//_PSEDITIONS/HiFiWorld/Hi-Fi%20World/September%202007/PDFPages/Page92.pdf
http://editions.pagesuite.co.uk//_PSEDITIONS/HiFiWorld/Hi-Fi%20World/September%202007/PDFPages/Page93.pdf
http://editions.pagesuite.co.uk//_PSEDITIONS/HiFiWorld/Hi-Fi%20World/September%202007/PDFPages/Page95.pdf
http://editions.pagesuite.co.uk//_PSEDITIONS/HiFiWorld/Hi-Fi%20World/September%202007/PDFPages/Page97.pdf
OR
b) KAB SL1210 M5G with:
Fluid damper
Outboard PS
Threaded record clamp
Cardas tonearm rewire
Isonoe feet