Issues with transferring character from G3F to G8F

Matt_Castle

I've been trying to use SickleYield's guide to transfer morphs in order to move some of my more used characters over from G3F to G8F, but I'm experiencing issues where after I've used the Transfer Utility, some vertices are moving too far or even entirely in the wrong direction in the new G8F morph - here, parts of the fingers are moving completely in the wrong direction, completely wrecking the hands, and vertices around the elbow are moving too far, creating a ridge

I think I've followed the instructions correctly (zeroing the scale of the initial model, using the suggested approach of posing G3F to match G8F, ticking check boxes as instructed), and I've got the G3F merged morph working beautifully (even got the rigging fixed) - but even after several attempts of trying to toggle various settings, this still keeps happening. (Posing G8F to G3F before transferring causes a less obnoxious problem, but still a problem, so I don't think it's just I've managed to interpret those instructions badly).

The body shape I'm using is mostly Victoria 7, albeit with some additional morphs layered on top, and I'm experiencing pretty much exactly the same problem if I try to transfer just the basic V7 shape.

Where have I managed to mess up here? I know people use this method just fine for transferring characters nearly seamlessly between these two very similar generations, but I can't work out what I'm personally doing wrong.