The paper presents REKL, a learning component which interacts with TLTS, a knowledge-based tool that uses a model for redesign in the domain of printed circuit boards. The model has been implemented around a blackboard architecture. REKL acquires four types of redesign knowledge: (meta-knowledge, eligibility demons, redesign operator scheduling rules, and clusters of redesign operators). The last three types of knowledge are organized by REKL into redesign knowledge sources. REKL acquires new redesign knowledge sources by compiling the knowledge that is contained in redesign plants that the user creates in cooperation with TLTS. It acquires meta-knowledge for selecting among the redesign knowledge sources, by interacting with the user and TLTS.