There is a "load tone and volume defaults" tab on HD Workbench. For some reason the models are not preset to the correct values for all of the models. You must click that tab and pick the appropriate settings. Once that is done, it does make quite a big difference. The models sound much better in most instances. Sometimes it may show the correct match up on the tab, but click something else then go back and click the one that matches up with the model you have selected. Even though it may read as though it matches, sometimes it actually does not.