We are considering [pin and mating part] to drawings [numbers/revisions], quantity [quantity], for [location/removal function]. The attached drawing separates the removable interface from the fixed attachment. For the hole and pin separately, please confirm manufacturing capability against the specified lower/upper limits, the finished condition and surface requirements, and the inspection/report scope. For an existing mating part we attach the original drawing separately from current measurements. Identify deviations and unresolved questions, prototype/production scope and lead-time assumptions. Proposed changes remain subject to approval by our responsible designer.