A method of manufacturing a surgical kit for cartilage repair in an articulating surface of a joint, comprising the steps of: I. Receiving design parameters for a surgical kit in a computer controlled manufacturing system, said design parameters for the surgical kit representing a model for a medical implant and a guide tool for implanting said implant; II. Manufacturing a medical implant dependent on the design parameters for: a. the contour curvature for an articulate surface of a substantially plate shaped implant body; b. a cross-section for an implant body; c. an edge height for an implant body; d. a length and a cross-section profile for an extending post extending from a bone contacting surface of the implant; III. Manufacturing a guide tool for implanting said implant dependent on the design parameters for: e. a cartilage contact surface of a positioning body f. a cross-section profile (82, 122) for a guide channel in a guide body extending from the positioning body, said guide channel passing through said positioning body and said guide body, the cross-section profile (82,122) for the guide channel having a cross-sectional profile (82, 122) that corresponds to the cross-section (81, 121) of the plate shaped implant body and the guide channel is designed to have a muzzle on the cartilage contact surface of the positioning body at a position corresponding to the site of the diseased cartilage characterized in that a cross-section profile (84, 124) for an insert tool has a cross-sectional profile that corresponds to the cross-sectional profile of the guide channel with a tolerance enabling the insert tool to slide within the guide channel and wherein the design parameters for the cartilage contact surface of the positioning body comprises design parameters for the positioning body having three contacting points,, (44,) spread out around the guide body for contacting parts of the joint in order to provide stable positioning of the guide tool in the joint. I. Receiving design parameters for a surgical kit in a computer controlled manufacturing system, said design parameters for the surgical kit representing a model for a medical implant and a guide tool for implanting said implant; II. Manufacturing a medical implant dependent on the design parameters for: a. the contour curvature for an articulate surface of a substantially plate shaped implant body; b. a cross-section for an implant body; c. an edge height for an implant body; d. a length and a cross-section profile for an extending post extending from a bone contacting surface of the implant; a. the contour curvature for an articulate surface of a substantially plate shaped implant body; b. a cross-section for an implant body; c. an edge height for an implant body; d. a length and a cross-section profile for an extending post extending from a bone contacting surface of the implant; III. Manufacturing a guide tool for implanting said implant dependent on the design parameters for: e. a cartilage contact surface of a positioning body f. a cross-section profile (82, 122) for a guide channel in a guide body extending from the positioning body, said guide channel passing through said positioning body and said guide body, the cross-section profile (82,122) for the guide channel having a cross-sectional profile (82, 122) that corresponds to the cross-section (81, 121) of the plate shaped implant body and the guide channel is designed to have a muzzle on the cartilage contact surface of the positioning body at a position corresponding to the site of the diseased cartilage characterized in that a cross-section profile (84, 124) for an insert tool has a cross-sectional profile that corresponds to the cross-sectional profile of the guide channel with a tolerance enabling the insert tool to slide within the guide channel and wherein the design parameters for the cartilage contact surface of the positioning body comprises design parameters for the positioning body having three contacting points,, (44,) spread out around the guide body for contacting parts of the joint in order to provide stable positioning of the guide tool in the joint. e. a cartilage contact surface of a positioning body f. a cross-section profile (82, 122) for a guide channel in a guide body extending from the positioning body, said guide channel passing through said positioning body and said guide body, the cross-section profile (82,122) for the guide channel having a cross-sectional profile (82, 122) that corresponds to the cross-section (81, 121) of the plate shaped implant body and the guide channel is designed to have a muzzle on the cartilage contact surface of the positioning body at a position corresponding to the site of the diseased cartilage characterized in that a cross-section profile (84, 124) for an insert tool has a cross-sectional profile that corresponds to the cross-sectional profile of the guide channel with a tolerance enabling the insert tool to slide within the guide channel and wherein the design parameters for the cartilage contact surface of the positioning body comprises design parameters for the positioning body having three contacting points,, (44,) spread out around the guide body for contacting parts of the joint in order to provide stable positioning of the guide tool in the joint.