after having another look at the cooler, (because i have a second one i purchased to put in my pc eventually.) i realize the arm can be posted between the pipes and run along the grooves. this was my first build and this didnt occur to me at the time i put the arm together first then assumed that was the only way it would fit through the cooler.
I am 26 too and this was my first build. could not be happier with it. Watched a bunch of youtube videos whilst waiting on my parts to arrive so i knew what to expect. Good luck with your build.
The mount for the clip was just that way round. I figured it wouldnt be a big deal. But i know what you mean that thought did cross my mind.
Also it was only £40 i got it when i saw it pop up on hot uk deals which i was checking often for parts to pop up.
I had to impress my wife also as she trusted me to just purchase the parts and i just wanted that wow factor. That little bit faster startup and such contributed to that.
It wasnt too bad the arm was a little fiddly, i would deffinately recomend installing it outside the case.