It seems to be some interest in this and thought I'd post this to help motivate all those who thought they couldn't!
It's real easy and I'll try to explain it the best I can. Study the pictures they should help.
First here is the pole I have been using for at least 8 - 9 years! I'm a lil crazy and adventurous so mine is only 36" long. And yes I've put it to work many a time without having to shower outside! lol We wont talk about the few times I've been "tinkled" on, but had nothing to do with this pole!
36" piece of PVC (3/4" ID)
37" piece of aluminum (3/4" OD)
one end cap to fit the PVC
Here is the type syringe I use 12cc
I have to modify the syringe to allow it to slide up into the PVC. This is done using a knife or I have found using a Dremel tool to grind the plastic away is a lot easier . That truely is the fastest and safest way!
Notice the diameter of the plunger has been reduced and the "shoulders have been removed.
Take the PVC cap and drill a hole on the center. Approximately 3/8" to 1/2"
Next slide the aluminum pipe into the PVC. It should feel slightly snug but slide freely. If it slides too freely ... with aluminum pipe inserted gently bend over your knee ... not to much though.
Pull the aluminum pipe out to one end so that roughly 8-9 inches sticks out ... now on the opposite end slide your syringe into the end of the PVC. (you will load syringe prior to this step when using in the field)
Put the drilled cap over/through the syringe needle and just push up onto PVC. It should be a tight fit. Make sure its snug, so it wont fall off at the wrong time! Over the years I have replacedd this cap only a couple times from wear. It also doesn't hurt to keep a spare drilled end cap with you.
After you put the end cap in place remove the plastic needle sheath and you're pretty much ready to use your dispatch pole!
Push the end of the extended aluminum pole to depress the syringe.
You could always make your pole a longer length using this idea.
If at times you fear a unwanted result. Cutting a small "x" in a large piece of cardboard and pushing the pole through will give you a shield.
This is the easy part though ... now you need to learn how to use it correctly to achieve the odor free results you're looking for! Proper placement is necessary!
With some experience you'll have it figured out in no time!!!
I hope this helps.