Unless you're really good at timing Cockers, everything that makes a trigger shorter except the Shocktech Bomb and set screws take more time and acquired knowledge to properly time and keep in time over the span of its use. Slot plates were the norm for a long time because the Cocker had enough problems on its own, so improper timing needed not add to them. Flattened timing rods then were spawned to give shorter triggers to those who had both the desire and the knowlege to make it happen, then after a while people said why go to the trouble of changing the rod when you can change the plate and get it over with when they were wanting to make better plates from the beginning anyway. Gone is the necessity for flattened rods, dremels, polishing compound, teflon tape, and voodoo rituals to get a smooth, short trigger...
In short, go for a hole trigger, roller sear, pivot frame, etc. Short triggers aren't reserved for master airsmiths or people willing to pay hundreds of dollars anymore, just those who can read info sheets, forums, and instructions and follow them exactly or close enough and be able to figure out the rest.
