Hi, we have to replace an agraffe set in a 1960's Hamburg Steinway D. I was curious about which is your method to do so. This is my first time to install a Steinway ones: I was tought they should be: - 90 degrees squared to the string - With uniform height. About the 90 degrees: do you use a jig? how do you build this kind of jig? Just install by sight without jigs at all? About the uniform height: do you take off only the odd numered agraffes first and install the new ones with the original even numbered agraffes as reference? Or is that not neccessary at all? We are using original Hamburg Steinway agraffes 5.5 mm. How big is the turn we are able to do after the agraffes is contacting the iron frame without risk / break the agraffe? Do you prefer to reduce the iron frame to lower the agraffe or to install shims under the agraffe to raise it up? Your help and comments will be appretiated. Thanks. Iñaki Coello Valladolid, Spain