the extension (from lat. extensio "stretching") and pull apart on the rack
the case for me is centered around the issue to the realistic extension at body and limbs.
the different rack design
If the hand are bound to a fixed point, then by having the ratchet mechanism near the feet, the entire body is pulled in the lower direction.
maximum stretching of the arms will occur before maximum stretching of the legs is complete, if the rack owner preferred to cane, flog, etc. the arms.
the opposite is true is the legs are secured and the ratchet is at the upper end of the rack. the legs grow to a maximum taut first, but because most of a person's mass is in their midsection and thigh area, the arms are pulled for pain much faster, even though the arms are yet to reach maximum stretch.
the beauty of such a design is that the "head" and "foot" of the rack depend completely on which direction a person is laid onto it.
a rack where either the hand or foot position can be in a single locked position and the opposing end of the rack is where the ratchet mechanism rests.
this way, it will be possible to best isolate whether the upper body or lower body is the primary focus for the rack owner.
If the hands are bound to a fixed point, then by having the ratchet mechanism near the feet, the entire body is pulled in the lower direction.
maximum stretching of the arms will occur before maximum stretching of the legs is complete.
the opposite is true is the legs are secured and the ratchet is at the upper end of the rack. the legs grow to a maximum taut first, but because most of a person's mass is in their midsection and thigh area, the arms are pulled for pain much faster, even though the arms are yet to reach maximum stretch.
the most effective method of inflicting true pain at that point is to have the central section of the rack (where the body's midsection is resting) be a free-floating section that can then rise above the rack table itself, whether by means of a hydraulic jack or manual jack (as in the jacks found in cars to change tyres).
what this does is place stress equally on both hands and feet and accomplishes additional stretching without having to have additional length to the rack.
Nowadays of course custom-made and comfortable padded leather fetter cuffs are in use when the female body is being stretched on the rack or during suspension till to the body limit and strung to the point at which hips, legs, ankles and joints have reached their extension at the full length till to the point of feeling to be pulled apart.
the interesting case for me is centered around the issue to find authentic empirical values for an exchange of experience about the topic of the body and limbs to separate movable entities and moving them in opposite directions.
thank you for all with the rack enthusiasts and attention into this specific subject and for anything they answer can offer.