Nick,
The forces you mention will be just the same in any arm, whether with straight or offset cartridge, as long as it has an overhang.
And similar overhang or underhang will produce similar skating forces, everything else being equal.
In your example, the arm has zero overhang at one point, which also coincides with it being a null, ie stylus and cantilever tangent to the groove.
As soon as an arm has any overhang there will be skating forces irrespective of whether there are nulls or not. Cartridge offset is a bit of a red herring.
See http://odysseytonearms.blogspot.co.uk/2011/10/antiskate.htmlfor more info on antiskate.
John
.
The forces you mention will be just the same in any arm, whether with straight or offset cartridge, as long as it has an overhang.
And similar overhang or underhang will produce similar skating forces, everything else being equal.
In your example, the arm has zero overhang at one point, which also coincides with it being a null, ie stylus and cantilever tangent to the groove.
As soon as an arm has any overhang there will be skating forces irrespective of whether there are nulls or not. Cartridge offset is a bit of a red herring.
See http://odysseytonearms.blogspot.co.uk/2011/10/antiskate.htmlfor more info on antiskate.
John
.