Macro rails that won't break the budget?

I'm looking for a macro rail to use in the field with a nikon d300s and 105 macro lens. Since I've recently invested in Photoshop and Lightroom, my bankroll is flat. Any suggestions? Are the generic ones from Adorama up to the task? Any other ideas? Suggestions appreciated.
Thanks
Celeste
(whose eyes are always bigger than her budget...)

I have the Adorama set and it works well, for the price try them

Thanks, Myer, I was considering it but it had mixed reviews on the web. Glad to hear from a real person.

Celeste,
I recently purchased a focus rail from Adorama. It was not their cheapest, but the next up at $60.00. So far I have been pleased with the operation of it. It has front to back and side to side movement, but does not offer up and down. Also, it is a bit tricky to get the lens attached, but that could just be me and my old fingers. It has mde macro photography muck easier for me. I have used it with the Canon MP65 macro lens and the Canon 100mm macro. Good luck.

Hi Celeste, I assume that you've got a good tripod and quick release set up. If your quick release takes arca-swiss type plates, you can use a lens plate attached to your camera along the lens axis ("mounted wrong") to get an inch or two of back and forth movement. I've found that this is more than enough forward/back motion combined with lens focusing to get the vast majority of my macro shots. The only time I've found this set up lacking is when I'd like some careful side-to-side adjustments but those situations are rare when working at less than 1:1. I use the Canon 100mm macro.

Thanks for all the advice, guys. I am interested in precise movements to allow focus stacking. I do have an Arca ball head, so my next query is: has anyone mounted the Adorama system to an Arca system??? Hmm, this is getting complicated...

I have a non-brand focusing rail system (got it 2nd hand) that is almost identical to the Adorama one (see link below) and I believe they are from the same manufacture. I use it on a Arca system (Markins M-20 ball head).

http://www.adorama.com/MCFRS1.html?gclid=CPfIyZmkjLYCFZFaMgodrhIA2A

The system is not particular solid, to be frank. Lots of wobbling.

However, I figured out that the problem is with the Y-axis rail. Once I remove the Y-axis, it becomes very solid. I don't need two-axis movement so it doesn't bother me at all. All I need is to move the camera back and forth, and this system serves the purpose well.

Note: if you remove the Y-axis assemble, you need something else to attach your camera to it.

Chances are the Adorama system is 1/4-20 threaded top and bottom. To put such a thing on your Arca-Swiss head, you will need a plate for the bottom of the rail device. Probably any flat-top (as opposed to lens/camera specific anti-twist) plate will probably work. You should be able to thread the 1/4-20 stud on the top of the device into a threaded hole on the plate that is currently on your camera. That's not especially elegant or quick, but if you're stacking macro images you're probably not in a big hurry. The weak/wobbly point in something like this is probably the rail itself. So, you'd be in for the cost of the rail, plus a flat topped plate, unless you have one sitting around.

Pete

Yes, you do need a "flat" quick-release plate mounted on the bottom of the rail.

I also mount an Arca-Swiss type quick-release clamp on the top.