Mounting of a tonearm.

Have tried up to max antiskate but makes no difference.
I have aligned cartridge the best i can and adjusted VTF no improvement.
I would like to find out how to determine the correct mounting position of the tonearm from the spindle.I think this could effect the tracking error. Or is the spindle to tonearm distance that critical?
Todd

Thanks everyone for your feedback. I have found after very careful checking of adjustments that the distortion i am hearing is on the record i am playing. It only happens on the last track of one lp. When i first heard the distortion i thought it was in the setup so i tried re-adjusting everything i could but could not reduce it. I was concentrating on that one lp only cause the lp was only 3 weeks old with maybe 5 plays and thought it should not have any distortion it is new. I noticed the distortion from day one but thought it was setup issues. I played a dozen records or so last night and heard some distortion but only a couple times on some 35 year old records.
I am new to vinyl so i am not sure what distortion is part of the setup or on the lp.

I am using a ZYX airy 3 which should track just about anything . I have some cartridge alignment tools on the way , so far i am just using a paper template i downloaded off the internet from Enjoy the music.

Thanks again
Todd

Sorry guys for not replying sooner , have been away.
I have 2 new Clear Audio records that do it. One is Friends of Carlotta on the track Time
After Time , at the very beginning the piano has some smearing type distortion. The second record is Bella- tracks of the heart. The electric guitar has the same type of distortion .Both of the instruments have large amounts of echo mixed in so it could be in the recording. The funny thing is the voices are crystal clear with no distortion ,it is only these 2 instruments on 2 tracks.
I don't know how to describe the distortion i am hearing i don't know the correct terminology for all the distortions.

I have been using Doug's cleaning method with the Magic eraser after every play and the stylus is very clean now. I am now using Audio Intelligent #6 cleaning solution and things are sounding great except for the distortion. I am beginning to suspect the tonearm but the interesting thing is it only distorts on specific tracks on certain records at different locations on the records too.
I have learned alot in the last month and the sound has improved an incredible amount thanks to Doug and everyone else that has helped out.
Todd