Nahh that's not a hole, but there might be one in the crankcase soon! Flaming barrels!
Anyway, the bolt to remove the rotor came. After a couple of grunts and cracks she popped off nicely.
Undid the upper crankcase bolts then span the engine over and whipped the sump off. Bit minging, and I found a bolt head in there.... Must be the one that had been snapped previously. Which could mean things are buggered.
Anyway, undid the rest of the bolts on the bottom and gave the casings a good few whacks. They didn't want to come apart, so I put a long bolt in two of the threads and tapped them down whilst holding the bottom casing.
Put all the internals in bags and sealed them up. Probably should have got the front sprocket off the output shaft of the gear box but hey ho.
Got the crankshaft etc out and then realised I couldn't pull the pistons without the barrels off. Bugger.
Also the barrels still will not shift. Scared of hitting the underside of them, don't want to damage anything.
Not exactly sure how to get the barrels off now, but I have one last hope. I'll take them to the clubs workshop and get the heat gun on them, see if that helps.