@Zubb - I just used the SteelStick on @Hawkins magnesium cover on his AT DCT.
The hole was small, but plenty to be spitting oil if upright, I was initially worried about adhering to the magneseum cover because it's shiny, but all three of us gave it a tap about 5 minutes after applying and it was very solid. That was only like the 1st 3rd of the day's riding, and it didn't lose a drop after that.
I have also used traditional jbweld from the two tubes, but usually on 4 wheelers. The one stick is easier to carry, i just wrap both ends with E tape to keep it secure. Edited to add: In my experience with the steel sticks, you just need to make sure you do a good job mashing it together to get a good mix, then it will set in that 5 min and be super solid (don't lick your fingers afterwards).