The gear puller didn't work on the right crank. I had to configure it as a 2 legged puller to fit the crank spider. It wasn't stable enough when I tried to tighten the bolt. I decided to try the std crank extractor tool after spraying with an oil penetrant and heating the crank with a hair drier, and it worked
. But there's still the left crank to do.
I tried the oil and hair drier on that after screwing in the extractor tool as best as I could into the damaged threads. No joy and the threads are really rogered now. So I tried dremelling the crank off. I've broken 2 cutting wheels in the process and still haven't cut through to the spindle. Tried a hacksaw but there's not enough clearance. The 4" crank puller can't get a grip on the left crank.
I've ordered the Unior taper crank puller, though I don't have great hope now that I've partially destroyed the crank. Thought it worth a go. A 3" crank puller might be able to get a grip, so that's another possibility if the tapered puller doesn't work.
If all else fails I can try bashing it with a drift. Have been avoiding this so as not to damage the BB bearings.