Basis 1400 TT...

All Rega single pillar arms are drop in replacements, along with Michell arms. The best choice would be a Basis Vector arm. There are others using the Rega platform that would also work. The difference between the Vector and another Rega is stunning in the best possible way. I replaced my Rega arm in a Basis 2000 with a Vector and it was a huge improvement.

Thank your response. I guess I should have mentioned a budget. The Vector is a great piece but a little more than I wanted to spend. I was looking under 1k in the used market. So the Michell arms would be a direct fit? .

Michell should be if they are the single pillar. The Graham Robin should also work and Origin Live. I bought a NOS Vector 3 a few years ago for about $1,300, so if you can stretch your budget a little and watch used ads you might be able to get a Vector close to your budget. It would be worth the extra time and money if you can find one.

I would replace the inner wire from the Rega. It is a cheap mod and the result is stunning. The standard cable is cheap and far away from something serious.