Here you go Bean:
I get 10 ft length of 1 inch diameter pvc and the caps come in a bag of 12 at Lowes. Really cheap. I cut the pvc in 2 inch lengths and then put the cap on. you can glue them or just pop them on and tap them tight with a hammer. I then drill quarter inch holes through the cap and pipe for scent dispersal.
I also prefer to weld a fender washer on teh stake. This helps alot to satablize the trap.
I then can prebait all my dp's. Push the spring like you are setting it and then put he cap in the hole and let the spring compress on the cap.
Then when i go set them I can just compress the spring latch the dog and slam them in and go to the next.