I'm as certain as I can be at this point. My B Vegans (Mexican Red-rump Tarantula) looks to have moulted into maturity. Seven weeks of not feeding had me worried, previous pre-moults lasted a week, two at most.
I'm pretty sure I can see tibial hooks, and it's certainly a lot leggier than before. As this just happened last night (my local time), it's still being a little cautious and hiding.
No doubt I'll get a better look in a day or two's time