This is something I've been in correspondence with Rich about, but I thought I'd mention it here in case anyone else was unfamiliar. my 7VWH makes a very faint wood-on-wood creaking sound the first time I do a pull-up after I haven't picked up my guitar for a while. it doesn't do that on subsequent pull-ups, just if it's been sittin' still for several hours.
Apparently, this is very common for floating bridged guitars and is nothing to worry about. Rich said that it's just the neck 'realeasing some stored energy,' and as long as it doesnt' do that on every pull-up, the neck pocket is not too tight.
One thing I forgot to ask (and Rich, maybe you can answer this if you get some time), is whether or not it's important to release the stored energy with a pull-up each time I play. Seems like that's a good way to go through strings in a hurry, but if it's something that needs to be done...