Macro nodal/focusing rails - preferences?

So far the ones I've found are RRS at $345 per rail (you can get two so you get forward/back and left/right) and Kirk at $270 per rail.
Does anyone use either of these? opinions? Bloody things are expensive, but if they are as smooth as you'd expect, it could make a huge difference in 1x+ macro work.
Any others you know about or use?
thanks!
Does anyone use either of these? opinions? Bloody things are expensive, but if they are as smooth as you'd expect, it could make a huge difference in 1x+ macro work.
Any others you know about or use?
thanks!
//Leah
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Comments
http://www.nodalninja.com/
Dale B. Dalrymple
http://dbdimages.com
...with apology to Archimedies
Awesome
If you have to work in nature then I suggest the "bean pole" method that our Lord Vetinari uses:
http://www.dgrin.com/showthread.php?t=24569
Moderator of the Cameras and Accessories forums
Thanks for the link - I hadn't seen that before.
However, I'm just NOT a bug-macro person. I'm typically right down on my hands and knees and studying small itty bitty plants and flowers. That's my
http://www.bhphotovideo.com/c/product/163878-REG/Novoflex_CASTEL_MINI_Focusing_Rack_Small_Mini_.html
But then I got it for $35.00 new in a photography shop. The owner had it on the shelf for a while. Only one directional. The bi-directional is a touch more expensive. http://www.bhphotovideo.com/c/product/379022-REG/Novoflex_CASTEL_CROSS_Q_Cross_Q_Double_Rail_Focusing.html
Wow what a deal! I've heard of Novoflex but hadn't thought to goggle for any. thanks!