My new Snyders catalog list a new better designed roller timer. I tried one, pretty nice except, first time i put it in started up nice ran terrible, took it off, no spring on the roller? Found it in the grease, thought maybe I knocked it off with my finger, then I compared it an old one. The "finger" that holds the spring isnt quite bent as much, just a little tweaking with pliers solved it. But wish I would have caught it before I packed it with grease.
New on the left old on right
I think you had just bad luck. I had 4 of it in the past few years and they are still working without any problems.