Our wellie has always been a sweety (so far). Now, she never much cared for being picked up (and still doesn't), though she will tolerate it with no more than some minor grumbling when first grabbed. However, she has always been one of the most inquisitive, not spooky in the least, and quite gentle.
Keep handling them regularly, but also put effort into being around them. Just being within site of them will get them more and more used to your presence and they'll quickly come to realize that you're not a threat at all. Hand feeding them treats (or even putting their regular feed in your hand for them) will do wonders for making them approachable without a fuss. We would also reach out and just scratch their heads or stroke their backs periodically (approaching them from the front and at their level, always).
Now, at 12 weeks, you can walk right up to any of them (except for the EE, who is just high strung in general) and they couldn't care less.