Harness is compatible with Volusion! Follow these steps to "Harness your Website" on your Volusion
Step 1: Log in to your Harness Admin Dashboard
Step 2: In your "Settings" - click on the "Website Code" tab (or Click Here)
Step 3: Copy the "Harness your Website" Code
Step 4: Log in to your Volusion Account
Step 5: In the Top Menu, click on "Design" > "File Editor"
Step 6: In the drop-down menu, select the .html file (based on the theme you're using)
Step 7: At the bottom of the editor (scroll down) - Paste your Harness Code just above the closing </body> tag
Step 8: Scroll back up and click "Save"