straightshooter,
I note what you say about "the trigger having to pull the full weight of the mainspring". Unfortunately, the spring is heavier(?) than stock because the original would not fire the rifle. Bit of a dilemma, eh?
To be candid, I have been seduced by topics from the gunsmithing section on marlinowners.com, where people report success with improving their 336 triggers. Of course, the 336 is unlike the 464, being much easier to take apart for one thing. The 464 sear is a separate part, making it even more complex, even if I could take the damn thing apart.
It's looking more and more like I will be making enquiries of the importer.
p.s. I am becoming acutely aware that I am trying to turn a sow's ear into a silk purse
![Crazy :crazy:](./images/smilies/new-crazy.gif)