Hi
You'll need to send it in, as you need a custom tool to remove the top cap of the reg.
If you could e-mail your details - name, address, contact telephone number - to
eurotech@dyeprecision.com (eurotech at dyeprecision dot com) then I can send you a returns reference for sending the marker here.
There may be a charge to pay depending on the version you have. If you can include a pic of the reg in your e-mail I will let you know whether there will be a charge to pay.
Thanks
Ash Chaplen
DYE Europe