I've used the "taco method" for LF development a couple of times, and my main problem was that I shaked the Paterson tank so much that most of the bands ended in the bottom and the sheets mixed. This was not quite good as uneven development appeared.
Last time I tried a much more gentle shaking BUT I reused the bands. And ended with negatives like this one (taken with a newly arrived 4x5 Crown Graphic), with a weird circle (only this negative in 5) and green spots.
Anybody has seen this with the "taco method"? I would not reuse bands again, but maybe even better use plain rubber bands, not the ones covered in textile (hair bands).