Bias on Koetsus

Thank you Albertporter and Tora for your responses.
I shall go through the postings as you suggest.

Must be something wrong with your Koetsu sample. All Koetsu cantilever is absolutely straight from factory, and they do require proper anti-skating.

I have experienced that after setting anti-skate that was 0.2g too low, the cantilever was slanted, and I have to retip ahead of the rated life. Very expensive mistake.

It could also caused by that particular Koetsu was older and thus a 'weaker' suspension?

Thanks Extreme phono for your useful comments. I am
using SME 309 with my Koetsus and wonder what bias to dial in. Using a test record does not seem to produce the best sound. Both of my cartridges are old- an
original Onyx and a more recent red K sig. It is quite
likely the suspensions have become weak but the diamonds are still (according to Expert Stylus Company who inspected them recently) servicable..