Hi Paul, did mine a couple of weeks ago and very easy to do , the longest part of the job was removing the old adhesive which you need an old store card etc , piece of cloth and some Ethanol .
Soak the cloth and wrap it around the store card then proceeded to remove the adhesive.
When fitting the new rubber use a blunt ended tool(I used a timer wedge) no more than 3mm thick on the end so as not to perforate the rubber, you can push the seal into place easily with this.