i prefer timney's to bold but they both work good.
if you think simply grinding off the 1st stage hump will give you a better trigger you will be in for a rude awakening when you actually do it.
what you will get is a very long very heavy trigger. if you understand levers, fulcrums & work you'll be able to see & understand why.
the first stage is light because its pivot point is closer to the fulcrum, when you remove it you move all the work to the very end of the trigger making the pull heavier and you raise the sear higher up at the same time making the trigger pull even longer. you have to shorten the sear height to overcome the long trigger, you can also put an adjustment screw on the trigger and it will do the same thing. to lighten the pull you have to move the back of the trigger forward by putting a large radius on it to shorten the distance from the fulcrum to the pivot.
here are a few pic's of mauser triggers so you can see what i'm taking about.
left is a aftermarket MKV single stage trigger, middle is a trigger modified to single stage by removing the 1st stage hump and right is an unmodified trigger. notice the radius on the back of the MKV trigger it moves the pivot point .053 closer to the fulcrum.
MKV sear sits .106" lower than a modified single stage trigger in a military sear, MKV sear measures the same dimensions off the rifle as a standard military sear.
here you can see how they sit in the receiver. MKV trigger & sear sit level in the receiver.
modifed trigger in a military sear, back of sear is raised quite a bit up into the receiver