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Hi Jim,
I'm very new to BTZS but recently had the tubes sent to Australia -- I have a Jobo but found that if I wished to use the versatility of the system then individual processing times for individual sheets meant for me the tubes.
I have found the tubes to give very consistant results, with negatives that are the equal or better than any I have from the Jobo. I found, for me, the secret of the tubes was no matter what, agitation [rolling] has to be the same each time I process. This is very easy to achieve and to my suprise I get totally repeatable results. The tubes are very well made and the system has been well thought out from the point of view of practical use. I forgot at one stage and used the tubes in bright light in my darkroom and didn't suffer any fogging. [100iso film] I of course carried out the "in the dark" procedures -- in the dark.
The results from the tubes and the Jobo for me are similar but not the same, I prefer the tubes. I could have processed with the Jobo and saved the cost of the tubes but I'm glad I did get the tubes. My Jobo will now be used for roll film -- If I ever shoot any again 
Jorge gave a good tip for removing film from the tubes: Have the tube filled with liquid. That worked for me.
Oh and don't be put off by manually rolling the tubes, it is suprisingly theraputic 
Steve
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