I have a Ruger model 77 with a tang safety. The original tang safety linkage feels solid and secure.

In contrast, the Timney linkage looks like a wire spring. Here is a picture of it to the right of the trigger housing:
http://timneytriggers.com/index.php?option=com_wrapper&view=wrapper&Itemid=53

I have seen a post on this forum complaining of the vague spring-like feel of the Timney tang safety linkage. Is there a better aftermarket trigger for the Ruger 77?