I have had a terrible squeak in my Excalibur when I raise the upper arm. This has been going on for some time. I have tried to adjust things to get rid of it but it would not go away. Today I had had enough so I emailed Seyco, where I bought it, to ask for advice. I had a reply in less than 30 minutes. Ray asked me to please call so he could listen over the phone to the squeak. I called, all were busy so I left a message. Ray called back a few minutes, he listened, told me what to do and 10 minutes after we hung up, saw fixed, squeak gone and saw running smother than it has since I bought it!
Don't be stubborn like me, got a problem with your Excalibur, call Ray!