Dan,
I couldn't agree more with Neil.
I keep getting asked for smaller pens rather than bigger pens.
The Zeta and Epsillon filled that part for me.
The sierra is a bigger tubed pen and in my view the Zeta kills that market.
If I could get a better quality "cross" type kit then I would look seriously in to those, along with a smaller 8mm tubed "Parker" style kit.
As for 8mm tube kits, I have not seen any good quality ones for a long while now (Neil may confirm that) but they are a much smaller kit and was very popular.
What I get is small is best, if that makes sense.
