Found he does have a video for a simple coarse 5 spice GM. Cassia, black pepper, clove, black cardamom, cumin. No info on amounts, but shows the whole spices together on a plate, so again straightforward to work it out; and indeed personalise, if desired. An impressive curry me thinks. Look forward to giving it a try. Although tonight MDB MKI Balti chicken pathia is on the menu.
Rob
For the GM view the "oldest" vids on his channel and it's easy to find. There is a also a vid on a chaat masala, although I haven't watched it yet.