Yeah I mean I've played with filtered samples before, y'know to grab a bass line off of one sample and put it under another, but I always had those phase problems when it was the same sample filetered & non-filtered. So I would just end up replaying the bassline verbatim. Only problem is, I usually attempt to use the Low-End Theory for an atmospheric effect I hear on certain hip-hop records that use LET, and you just don't get that filtered atmosphere from a replayed bassline, but I'll try that with the delay.
You don't happen to know if that LET thread is still on here, do ya?