Those instructions that you think are for an older model of pole are still good for the other ones. Mine didn't come with a spanner wrench and the adjuster screw was already in mine also. They do that part for you for shipping purposes - same thing when you get a 45mm pole; it uses the same base as a 50mm, but has an adapter that they screw onto the base for you just for the shipping. Same idea. But the whole assembly is the same as the video, just skip the part where it tells you to thread the adjuster and use something else in place of the wrench (I used my hand, but you could easily use your own wrench).
Just putting this out there (and I know I'm not the only one) but I'm usually putting my pole up by myself, so it's easier to put the dome on last instead of putting it on the top pole then screwing the final pole pieces together.
Here's a quick run-through of how I do it (refer to the video for the actual instructions, this is just a general guideline):
-apply WD-40 to the threads on the poles, also make sure the pole is in static mode (meaning the hex screws in the base are screwed all the way in)
-find where you're going to put it, making sure it's going to be directly under a joist if you're in the US, between 2 joists if you're in the UK.
-figure your extensions (the instruction manual had this, not sure if it's on the website)
-place the base on the floor
-screw on your extensions and the poles, starting with the smallest at the bottom and working your way up to the biggest. Screw them about hand tight, don't need to tighten them all the way yet.
-if you're using the adjuster cover, slide it on before the pole gets too tall to reach. I don't use it, personally... it's not necessary. Also put that little ring thing on the very top just before you put the dome on - make sure the ridge on the ring is on the upper side, otherwise the adjuster cover won't be able to get on the spring buttons to hold it in place.
-put the dome on top
-standing on a chair or something if need be (I don't need one... short ceilings), turn the adjuster screw to the left (counterclockwise) so the screw will get longer. I use my hand (you could use a wrench) until the hole is showing for the rod, then I switch to the rod.
-Just before the dome touches the ceiling, I would double check the placement with the joists. It's a bit easier to tell when it's closer to the ceiling. Move the pole if you need to.
-keep extending the adjuster screw until the dome is just touching the ceiling - enough to hold it in place, but not snug yet. Get down to check and see if the pole is perfectly vertical. Either use a level or use your eyes to line it up with a straight edge in the room, like a corner or a door frame. Make sure to do this in 2 spots on the pole that are 90 degrees to each other. It might look straight from one side, but it's not from another. I walk a full circle around my pole and stop in 3 or 4 places to check. Also make sure the dome is flat against the ceiling and isn't crooked.
-get back up there and extend the adjuster screw until the dome is snug. I keep going until it gets really really hard to turn, but not until it's impossible to turn anymore.
-get down, then take your release rod and working from the bottom up, stick it in each of the poles (in the holes) and turn them until they're tight. Don't overtighten them! Probably maybe another turn after you're getting some resistance? Remember you have to undo them again later.
-Go back and make sure the dome is snug again. You'll probably have to give it a few more turns now that the rest of the pole is tight.
-Take the locking nut and screw it down the adjuster screw until it's against the top of the pole. Either use a wrench or the end of the release rod (there's a hole in it for the rod) and turn it so it's tight, but not so much you can't undo it again later.
-Get down, move your chair, and give the pole some tugs or even a simple spin or 2 to make sure it doesn't move. Just don't do something all-out right away and have the pole fall on you... be cautious until you're sure it's not going anywhere first!
-if you're using the adjuster cover, slide it up the pole and onto the ring just under the dome. Let the spring buttons come through the holes and it should be in place.
-you're done!
***make sure to check to make sure the pole is still tight and snug before you use it. Any bending means you have to tighten the poles themselves, any sliding means the dome isn't snug and the adjuster screw needs to be played with. Also check the locking nut to make sure it's still snug against the top of the pole.
I think I got everything... I'm sure someone will point it out of I'm wrong.
****Like I said, this is a general guideline! The X-Pole DVD video version actually does a good job of explaining how to do this... watch the video and take notes if you really want "THE" instructions on paper****
I'll re-post with the break down instructions...