A Chemo Cap for a dear friend

Went through the stash last night and found the ball of white "Oh, My!".  Or at least that's what I think it is.  It's definately all acrylic or poly something, very white, extreemly Soft.  Wound it up into a center pull ball (by hand) and placed the ball inside a "yarn bra?" to keep it from unwinding too fast.  Remembering from working with this before, it is sooooo slick it unwinds itself and gets horibly tangled.
I started off using 2 circular needles of the same size because I had them and couldn't find the double pins the right size and the metal double pins tend to fall out with yarn this "slick" anyway.
Cast on 7 stitches by holding both needles parallel and looping the yarn around each alternately. 
(Note: look up what the name of this technique is, learned it from a sock knitter.) 
Why 7? 
8 sections in a cap is too flat topped for my taste because it increases too fast.  6 sections is too pointy, IMHO.  And, Because it's a spiritually significant number.
1:  Join the round without twisting.    (Actually, that's not quite a right description of what is done, but it's what all the patterns say to do.)  Place a marker at the join and that will be the beginning (and end) of each round.
2:  K all  (there should be something in here about knitting in the front or the back, because doing it the wrong way will "unloop" the cast on stitch and leave a hole)
3: Knit in front AND back of each stitch.
4: K all
5: *K1, K in front and back*, repeat 6 more times = 21 stitches
6: K all
7: *K2, K in front and back*, repeat 6 more times = 28 stitches
..