I wont say, "you cant". You wanna try, go for it. Maybe you will come out will something different. Why not, another dropcatch service wont hurt. But heres what i think.
Drop catching is an arms race. The more registrar credentials someone has, the more likely they are to catch a dropping domain. So the big players in the backorder space – companies that specialize in just drop catching – have amassed an army of registrars. Often those aren't registrars that exist to serve customers; rather, they're just extra credentials used to ping the registry in order to attempt to register a domain within milliseconds. More registrar credentials implies faster, more frequent registration attempts. Amassing so many registrar credentials is expensive, and the specialized drop catchers already have captured this market share.
So, if you can come out with a new tech, gr8, we all want it.