Did you send them back or still have them? If so, I would suggest trying the Gen 5 trigger housing and a + connector. There are so many great things about it and it really changes the trigger dynamics and improves so many things wrong with the Gen 1 - 4 triggers. Also, try the GPT along with your Ranger Proof trigger. Don't see how there would be any possibility of it failing the drop test due to the design of the GPT. You may find a work around and will be glad when you did. The Vex triggers, as you know, are awesome when you get it all synced.
Thanks, but I'm going to pass. The trigger shoes are quite attractive and nicely finished. But, based on this experience and what (at least think) I know, the problem is the geometry of the trigger shoe link (to the trigger bar) which is what removes the pre-travel or take-up. It simply goes too far, placing the cruciform precariously half-off the ledge of the trigger housing shelf.
Furthermore, I suspect the spring for the trigger safety dingus is too weak, which is how the inertia generated in a back-of-the-gun-down drop is able to overcome that safety, allowing the trigger to be activated when dropped in such a manner. That is unacceptable and a safety test FAILURE. If I would accidentally drop the (loaded) gun, and it happened to land on the ground in that orientation, it would be a BANG. No bueno. Not an acceptable risk AT ALL.
For those reasons (and experience) I have eliminated ANY trigger of any brand that reduces pre-travel from consideration in one of my builds. And that eliminates MOST of them, as I discovered pre-travel reduction seems to be a popular feature.
Losing that margin of safety isn't worth a shorter trigger pull for me. The standard pre-travel isn't a negative or a problem for me. For me, it's kind of like a "two-stage" precision rifle trigger. I kind of like the take-up to that first break.
Do you drop test your builds? By that, I mean actually DROP them from shoulder height to the floor.