Below is the video on YouTube showing the finishing the dome plug I have actually cast the dome now and will be releasing the video shortly.

The dome is made of an MDF base packed with polyurethane expanded foam with a shell of automotive body filler, see the pictures below.

A lot of work has gone in to creating the dome plug and I am really pleased with how it has turned out and I am excited to get the next video out to you guys. watch this space.