Any progress on this 103a?
I just bought the same and am waiting for it to arrive.
About the creep. My tiny experiance tells me that the grease they used has hardened and might look more like wax now. That can be the problem.
If you dare to take it apart and clean all parts you can turn it into new again.
I have done that to many lenses but I also broke some in the process.
Its hard to do if you cant find any guides on the dissmantle process. Once you took one model apart you hopefully learn so that you can do the next one you find proper,even if you did break the first one in the learning process
if you actually did take it apart maybe you took some images of the process that you could share?
I think I will have to take mine apart when I get it..... . ..