Appreciate pointing me to the correct forum to request assistance.
Thanks and regards -
Chainfire's 3D app has caused my rooted Galaxy SII (GB27) to go into boot loop. Using ADB within the SDK has allowed me to move around and discover the required 3f3d_uninstall.sh file is missing. Moving this file into the correct directory (/system/lib) will allow removal of the app - This should allow the device to function again.