Balance includes measurable physical properties and subjective handling responses, but the two are not interchangeable.
Some contributors to balance are measurable
A product’s mass and center-of-mass location can be measured for a defined configuration. The reference point, orientation, installed components, and sample condition must be stated because changing an attachment or load can change the result. Depending on the question, rotational behavior may also matter, but one numerical location should not be presented as a complete description of handling.
Balance as experienced is subjective
When users describe an object as forward-heavy, neutral, stable, lively, or easy to control, they are reporting an interaction. That experience can depend on grip position, hand size, task, movement direction, speed, technique, and familiarity. Two people can use the same measured sample and reasonably report different impressions. Their feedback is valuable, but it does not replace the physical measurement.
Present both evidence streams together
A clear report first gives the configuration and measured center-of-mass result, including the measurement method and uncertainty. NIST Technical Note 1297 provides general guidance on evaluating and expressing measurement uncertainty. The report can then present handling feedback with the participant group and task conditions identified. This arrangement lets readers compare a physical parameter with observed experience without suggesting that one proves the other.
Avoid declaring one universal optimum
A particular center-of-mass position may suit a certain task or preference, but it is not automatically best for every user or application. Conclusions should remain limited to the measured samples and recorded observations. No SEWARD SKU can currently be characterized this way without its configuration record, batch-linked center-of-mass measurements, and original handling feedback.
Can center of mass alone predict handling comfort?
No. It describes one physical property, while comfort and control also depend on the user, grip, task, movement, and duration.