Advise on focusing rack/rail needed

[Rense]

I need a focusing rack/rail for macro photography with the MP-E 65 lens from Canon.
Do you have any advice on this?
Sofar I've found tools from Novoflex (http://www.adorama.com/NVFRX.html?searchinfo=novoflex&item_no=59) and Manfrotto (http://www.adorama.com/BG3419.html).
Do you have any experience with these tools?

Like to hear your advise.

[roli_bark]

How about Velbon (http://www.adorama.com/VNSSM.html)
I have it - and it is perfect (w. a Canon EF 180L Macro).
It has 3/8" and 1/4" options, and the lateral rail can be disengaged - leaving you with the Front-Back movements only, if you wish. Cheap too ...all Magenesium.

[Rense]

Roli_bark,
Thats a nice one. Do you use it?

[roli_bark]

Of course. On a daily basis.
[sorry - I edited after your 1st read it ...]

[Rense]

Roli_bark,

Thanks for your quick answer. I will look at my photodealer if they have it in stock.