Question on FR 66s

Suteetat, It is not my intention to suggest that you should become a collector of protractors but I ordered by Yip from the Mint tractor exactly this distance:231.5 mm
I need to adjust just one cart and than use this sample to adjust the other headshells/styli with a caliper. This method reduces those precarious adjustment acts to two: VTF and anti-skate.
Regards,

If you use the 231.5mm S to P distance for the FR-64s.......you will not be able to interchange headshells onto the FR-66s which is best set at 295mm.
I prefer to set my FR-64s at the FR recommended 230mm S to P to match the 295mm of the FR-66s.
And yes......I have listened to the differences between the 230mm distance and the 231.5mm.........

However I don't think this will solve the problems you have described Suteetat?
I have plenty of 'play' distance for all headshells I have tried on both my FR arms to align for ALL the known geometries.
Something appears amiss in your story?

Dear Halcro: ++++ " The horror.........oh the horror " ++++

well, I don't know if you already understand the whole subject or not but I know that other " flat head " persons can't understand because they don't care about other that " I like it ".

I know that you are a wise man and that's why your post is some kind of surprise on what I assumed you are. I hope you are not like other " flat head " persons.

Of course that if you are not looking to get/arrive, listen and enjoy to that very last MUSIC/analog/digital frontier you can follow sticky in your very very old DISTORTIONS. The best of all is that you have a very large " land " to advance, is up to you to do it. Good luck in your trip to MUSIC HEAVEN.

Regards and enjoy the music,
R.

Strange, actually, I should say that the problem is mainly with my Air Tight cartridge. Forgot to mention that Kiseki has 5 sets of mounting holes along its body so I have more range to mount the cartridge. Air Tight only has one set of holes to mount the cartridge. If I use 230mm, there is no problem and I have a bit of room to spare. Just at 231.5 only.
I assume that the center of the tower is where I would measure P2S.
May be it is just the Air Tight cartridge? I assume that all headshells have the same dimension, lenghtwise but assume that each cartridge will have a bit of a different dimension lenghtwise, as far as overhang is concerned.

On FR66s, I only try Koetsu with Oyaide headshell so far and I have a couple of mms to spare in front.

I did not have problem with Koetsu on FR64s in the past either but only at 230mm.

Halcro, if I remember correctly, you have Dyna XV-1s. I will try to mount XV-1s on one of my headshells and see how much wiggle room I have.

Now I seems to amass quite a few protractors, beside Feickert and Clearaudio, I do have 2 mint protractors for Reed and 10.5 arm. I have no idea what logarithm Clearaudio uses. Elsewhere on the net, someone mentioned that it looks like a Dennesen protractor but I am not sure if they only talk about the look or the actual null point. I burrowed my friend's Dennesen protractor once a long time ago and compared and I thought the nullpoint was pretty much the same. Generally I just prefer Clearaudio over Feickert just because it is much easier to see silver protractor with black line than black protractor with white line which my poor eyes really struggle to see especially with Koetsu and Air Tight cartridges where the stylus is hidden under the body of the cartridge.

Yes.....centre of Tower is Pivot point.
I do have the Dyna XV-1s which is currently mounted to one of my FR-66s arms..........but I also have 38 other cartridges ready mounted in their own headshells and all of them have been played on the FR-64s as well as the FR-66s.
In fact......with ALL my cartridges......I set them up on one of my FR-66s arms (which I can do very accurately using Dertonarm's UNI-Protractor).....and then simply swap them between 4 of my other arms (the Copperhead has no headshell and the SAEC WE-8000 S/T has its off-set angle built into the headshell).
My point being Suteetat......that I have had no mounting problem with over 40 cartridges in either FR arms......and I even had an Orsonic headshell which caused no problems?
Perhaps the Airtight is a 1 in 50 cartridge?........but something is certainly untoward in your experience?