The thing is though, the Emerald neck is also AIV yet in the same guitar it seems brighter and there's absolutely no hint of mush at all yet, as I said in the other thread I've started on this, Ben describes the neck Emerald as both darker and fatter than the neck Crawler, neither of which matches my experience of them in the same guitar. The neck Emerald is about as perfect as I think a neck pickup can get.
The issue of not being well matched was part of my concern with this. If I do go to a Mule in the neck, will that mean I'll need an Abraxas in the bridge and if I do that, will the AIV Abraxas, being brighter, give me the fat smoothness I like without any mush? If it won't, does that then mean that I need to have the Abraxas neck to go with the Crawler bridge?