I recently purchased a TimeFactor and so far I am pretty impressed with overall flexibility of the different algorithms.  I was curious about one request that seems to come up intermittantly concerning an internal solution/option for stacking the delays for mono signals.  I've been playing around with the patch cable method to force the two signals to run in series but I noticed that whenever I mistakenly come across a modulated preset, I end up with an earful of super screech/feedback which I would think an internal solution would protect against.