Pentel Tradio EnerGel Combo Gel Ink Pen - Soft Rubber Body - 0.7 mm - Green Body - Black Ink

I love the EnerGel pens. The Tradio was a little bit disappointing for two reasons:
(1) The grip is solid plastic (it looks like the very nice rubber grip from the disposable capped EnerGel pens, but it isn't, it's solid plastic).
(2) The cap snaps in place to close the pen, but when open it just slides over the end of the pen without snapping, and it works itself loose within a minute or two no matter how hard I slide it on.
I expected a lot more from the EnerGel series that I like so much.

We learned that the spring in the body CAN be removed by hitting the body lightly against your hand until the spring falls out, thereby allowing you to use the standard Tradio refill.