Yes, Mech Spyder frames will work. IMO it's not much of an improvement.
Replace the trigger spring with one from a clicky pen to lighten the pull. A blob of JB weld or your favourite epoxy on the top of the trigger spring arm portion of the trigger will allow adjustment of the pre-travel. Similar use of epoxy will allow adjustment of the post-travel, but there isn't really much excess at that end. Adjust by filing the blobs once dry. That's about the best you can do with any spring sear mech. If you are handy, you can add some set screws into the trigger instead of epoxy blobs, but remember it's just a cast aluminum trigger so it'll be brittle.
way too many paintball markers
an Egg II
Who says you can't polish a turd? Of course you can ...
you just need to dip it in Varathane a few times first ...
let it dry, and polish away ... shines up real nice!
I could care less what you shoot ... I'll still try to help.
Yes, I'm in this just to tinker