I was told to follow the instructions exactly, and can tell you now;
If your the type to toss them and bull your way through, you have quite a game ahead of you.
Having said that I must also say I read the instructions 4 times with all the parts laid out and still found myself proceeding very slowly with the "I wonder if this is what they mean" look on my face.
None the less as it went together, it worked itself out and I ended up with a grand job and the feeling; "that wasn't so bad!"

This photo is taken of the brass elbow in the photo above.

The only small trouble I had was locating the whole shebang in the air box they conveniently said to put anywhere in there.
(Refer to the photo at the top) the whole back and one side wall of my airbox is an integral part of the oil tank, the front is the removable pannel that butts up to the carbs which leaves just one side, the one with the belt! Hmmmm

The white, round part they call the "controle chamber" mounted easily just below the belt cover but the "compensator" had only one place I could find. If you don't read the instructions through, you will learn too late that these two units must be mounted with the exact length of connecting hose between them, as well as the chamber should be slightly below the compensator.
This kinda narrows the options.

With more "Hmmm" than problem, the thing went together quite well and the instructions, though confusing for quite a while really turned out to be very good and accurate.

My only un-fortold problem was that because of my mounting choice I had to cut the corner off my belt guard to allow it to pass the brass elbow.
with my handy dremmel and a file I was able to quickly take care of that chore.

The mounting of the chamber requires a 3/16 alan wrench and the mounting of the vacume source hose to the carb requires a very specific size drill bit (varies with the carb type) and red locktite, and Jets you probably don't have, (I used 450s for my 2001 polaris 600 xcsp) none of which are supplied.
but if you are going to do this yourself you should have the propper tools laying around the shop like I did, so no problems there.

All in all, the project took me about 4 hours, most of that just caution, it mounted quite easily if you are mechanicaly inclined at all and I would say this is a very well thought out product, quality made with good instructions.