I don't have a vehicle with droop screws. If I did, I'd use them. Since I don't, I use internal shock limiters. I'd prefer droop screws only because if you land really wrong off of a jump you don't run the risk of stripping the shock bottom out. Another reason for using droop screws if you have them is that there is a lot of stress being put on a shock shaft if the piston bottoming is what stops movement. Especially in a wreck. What is truly holding the shock shaft in preventing it from coming out? Is it just a little e-clip? I also don't like a suspension to hit full compression when the shock piston hits full compression. This can damage the shock too. At the very least run a small spacer/stop on the shaft. What I have done on some of my 1/10 buggies is to run very small springs on the shock shafts themselves such as old Associated RC12L/10L front springs. You don't even see them but they absorb some of the impact of a bottom out situation.