I emailed Precision Camera Works re. the shutters peed problem and got this reply:

Dear John,

As for the Noblex 135U, (please post this response on APUG - it saves us a
lot of future emails ) this is actually a fairly common problem and we
should be able to rectify it with a CLA (Clean, Lubricate and Adjust).

The labor for the CLA runs $325.00 + shipping (and includes minor parts).
(it will almost certainly need drive wheels (worst case scenario) and there
are 2 in your camera one is $68.00 and the other is $88.00 these are not
included in the CLA)

You need only ship it to the address below, well-packed and in a sealed
plastic bag with a note briefly describing the problem and your complete
contact information (name, address, phone and email). We will send you a
detailed estimate (free of charge) before doing any work. Should you decide
not to repair the camera the only charge would be for return shipping.

There is a 6-month warranty on the work performed.

Please send it insured and with no need for signature required.

Feel free to contact us with any questions you may have!

Thank you,
Bob Watkins
Precision Camera Works
ARCA-SWISS Authorized Service
7064 W. Main Street
Niles, IL 60714