Hi Duncan You can gain access with bottom cover. The CSA unit is not available as OEM but maybe the Farnell part is. My current thinking is to bail out of the 1000MP and go for a Mark 5. Steve E-mail message checked by Spyware Doctor (6.0.0.386) Database version: 5.11200 http://www.pctools.com/en/spyware-doctor-antivirus/