I wish Spyderco would make a mini-Sharpmaker with two medium grit half-length sticks that would slide inside a plastic base that is setup with both 30 degree and 40 degree holes.

What's close is the Smith's 3in1 sharpener. It's the same style as the Sharpmaker but it's smaller.

Unfortunately it only has the white sticks. It does however have a 750 grit diamond surface and a v-notch carbide sharpener.

For a more portable field kit, I can recommend the AG Russell Field Sharpener rig.

It has a pair of diamond rods and a pair of 400 grit brown ceramic rods. These are 4 inches long and 1/4 inch in diameter.

The angle is 15 degrees (30 degrees compound) which corresponds to the "back-bevel" slots on the sharpmaker. If you keep your knives that sharp you're set. Otherwise, you can put the final touch on the 20 degree (40 degree compound) edge freehand.

Bear