Things are going well - I've removed all of the bolts and cylinders and have all the right bits and pieces.
On the third cylinder, the bolt is broken off in the thing that it gets threaded into (see image below). My question at this juncture is whether or not I can proceed with changing out the spark plugs and dealing with extracting that broken bolt piece later? Perhaps zip tying down the cylinder in the meantime so it can't jostle loose?