I just about finished both of my rears(i've just been piddlin' on it here and there when I visit my parents).
I'm certainly getting better and faster with the wood chisel/torch method. I think my initial problem was not enough heat and not heating more of the blade. It's noticeable on my tread block cuts. On my first ones, it looks like a rabbits been nibblin' at'em. The ones I got to last night are more flat with only 2 scrape runs.
To finish both rears, i'll need to take it off the trailer. I've rolled it forward and backward as much as I can to easily get to the lugs. Theres prolly a section about a foot long on each tire that I just cant get the angle on while its on the trailer.