As of yet I don't have any experience with aftermarket tins but that's about to change since aftermarket is all I can get for my 38. My general experience with all types of aftermarket parts for cars and bikes is that there is a broad range of quality levels. Normally OEM is better but some aftermarket producers do produce a surperior product. The rule of thumb I use is to buy OEM when in doubt and OEM parts are available.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.