Transitioning between dolls without losing measurements hinges on careful documentation, modular components, and disciplined care routines. First, establish a baseline: measure the current doll’s key dimensions—height, shoulder width, bust, waist, hip, arm length, leg length, and joint ranges. Record these in a dedicated notebook or digital note, including skin tone and preferred posture. When acquiring a new doll, maintain similar proportions where possible to minimize large adjustments. Use modular sections—like interchangeable limbs or swappable heads—when available, as they reduce the need to alter fundamental measurements. Before any swap, re-measure yourself or the intended display space and compare with the new doll’s specs to anticipate fit and balance issues. Gentle handling is crucial; avoid forcing joints or re-tightening fasteners beyond recommended limits, which can alter alignment and measurements over time. Document every transition step: date, exact measurements, parts swapped, and any tweaks to posture or stance. Periodically re-check all measurements on both dolls to ensure consistency. Lastly, maintain a standard routine for cleaning and conditioning joints after transitions. With careful record-keeping and gradual adjustments, you can preserve measurement integrity while expanding your collection’s versatility.