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=== [http://foobazaar.com/podhd/toneGuide/CabsDelayTimes_V3.xlsx this spreadsheet]/[https://docs.google.com/spreadsheet/ccc?key=0AsSFadRSa9zYdG1kc1J2b1ZvRFVlUVIydXRMVVoyZnc&usp=sharing alternate Google Cloud version]/[http://www.foobazaar.com/podhd/toneGuide/tripGuitar_cab_delay.pdf pdf version] ===
→Phase Correction
I have done some pretty thorough research on this, and am continuing to update it. The link below is a spreadsheet with a matrix of every possible combination of cab/mic with another, for the Tread V-30, Hiway, XXL, Greenbacks, Uber, Brit, and Blackbacks 4x12 cabs with all available mics with the delay in samples@96kHz required to make them in-phase. It contains tabs/sheets on how to use it, a list of relatively tone-transparent effects with the amount of delay they introduce, and the combination of effects necessary to get any particular amount of delay.
So here's how to apply this knowledge. First look up any pair of cab/mic you want to use with any other cab/mic in the CabDelayTimes spreadsheet. Channel A's cab/mic is listed on the x axis, Channel B on the Y axis. Where these rows and columns meet, you'll see a number. That tells you the number of samples you need to delay Channel B to get phase correction. If the number is negative, that means you need to apply the delay to Channel A (if so, it might be simpler to simply switch the cab/mic in Channel B to Channel A and vice versa).