From what I've read on the official forums, it seems that they'll eventually die completely even if you can get them working with the shim. I'd say that it'd be best to see if your vendor won't exchange the cart for you, as it seems that many of them are now more liberal in their coverage time of the original design Evolutions as they are still failing even after working for months.
I'm pretty sure that realhotstuff is taking back ones even older than 90d (of the earlier design) and others as well probably.