A light bulb went off in my head yesterday after attempting to make another sear spring for a double set breach block. Has anyone converted a Ballard breach block to eliminate the original sear spring to a coil spring?

I have a single trigger breech block that came with a coil spring. It works well when the spring stays put. The car ride to the range seems to jiggle it out of position. It will not stay cocked until it is cycled several times. Once the spring readjusts, it reliably stays cocked and has a very good 1 lb trigger pull. 
I've tried multiple methods to keep the spring located, but haven't had much success. It has a hand shape block of plastic from a 3D printer holding the spring in it's position, currently.
I have a picture, but the file size is too big to attach.

Here is a pic of the coil spring.

I would think a threaded rod, screwed in from the top side of the sear, would keep the spring in position.  Make it just long enough to release hammer, and as a side benefit, the spring will stay straight and not buckle to the side.
Bob

Built a horseshoe flat spring for the Ballard. This little piece of steel took me two tries and multiple hours. The spring rides in a parabola like pocket in the breech block. The pocket is not a true parabola, more like a staggering, intoxicated circle trying to be a fancy parabola.   
I'm curious how this shape was machined.

KFW has it right - the OP was asking about a sear spring for double set triggers.

Regards,
Joe