I have seen many of your videos on Youtube and love them because they just get to the "nitty gritty" without being pretentious.
Did you know you can easily grease sealed bearings without getting them apart. Try this as it saves loads of hassle and it works.
1, obtain a large airtight bottle with screw top lid
2,Attach a vacuum pump to the lid with tubing. Pumps on ebay sell for around £15.00
3, use a large enough container filled with grease and put the bearing in it making sure it is covered. Heat up the grease over the cooker to make it "Runny".
4, place the container in the bottle, switch on the pump to create the vacuum. Air will be drawn from the bearing through the warm grease, you will notice bubbling on the grease. Its doing its job.
5, once left for a while, you can gradually de vacuum the bottle, the grease will now of course be drawn into the vacuum void created in the sealed bearings. You know this has happened because you will find an indentation in the grease where the bearing has drawn the grease in.
Your bearing will be as good as new. You can use oil, but it will not last quite as long, but none the less easier for penetration.
Remember, sealed bearings are not airtight, so this process works very well indeed.
better than trying to get them apart.
Try it and let us know how you get on, knowing you, I dont think you can resist it.