Hardest part will be removing the drilled out hex head at the bottom center. Once done it is just a matter of unscrewing the three feet and any other screws present on the bottom plate (some had additional some didn't). Be careful at this point because I believe the remote is wired and it is fastened to the bottom plate. I would suggest once you push the receiving sensor forward perhaps use some silicon caulk around the back end and allow it to cure prior to reassembly. Nice thing is you don't have to remove the chimney to address your issue. Hope this helped.
Sincerely,
David
Sincerely,
David