drippy usually means an air leak... the 600 has o-rings in all the right places to avoid that!

Let me remind you; "the cap is crap" (tm), so don't expect a sturdy clip for your $15 investment ...as I mentioned the cap from a $15 Hero 100 fits nicely and is much better made, so for $30 you can have a pseudo-vac 51-esque Chinese pen that writes very nicely *and* holds a s**t-ton of ink without the potential mess of an eyedropper filler.

Go for it!