Tried several pullers (and loads of WD40), but there's not enough space beside & behind the sprocket to position the fingers properly. And the pullers I used with thin fingers turned out too weak. Cover behind the sprocket is the aluminium oil pump. Applying some pry bar will certainly give damage. Yes, ...I've given up hope that this sprocket can be re-used, have ordered a new one already.
Using a chisel on the crankshaft makes me a bit nervous
You reckon the drilling option might work??
V.