Spindle-To-Pivot Distance

Mijostyn, good point but it seems to me we’re both right. Moving backward would preserve overhang at the expense of reducing effective length. Moving forward in the headshell would preserve effective length but increase overhang. Both work if you can also twist the cartridge. Neither solution is orthodox.

@lewm, I think my point is that you can not conserve the effective length of the are because as you increase overhang you shift the force vector clockwise to the point that the stylus can no longer maintain contact with the groove. Buy moving the cartridge back and twisting it clockwise you are turning the arm into an appropriate shorter arm which works at a SPD of 240 mm. I believe it is the only correct approach other than getting an arm that is the right length for the turntable. 
@rauliruegas , what is your opinion on this?

"You believe", is fine.  There really is no "correct" approach, since to begin with there is a built in error that will affect any solution.  Can you further explain what you have in mind as regards the effect of increasing overhang, to shift the "force vectors"?  Are you thinking of the skating force, or what? Of course, you would have to change the headshell offset angle, or twist the cartridge in the headshell, in my "solution", just as for your solution.