ip2=ip1
ip1=0  ip1=1     ip2=2     ip2=3     ip2=4     ip2=5       # of 1u Combos
       1.000     1.260     1.442     1.587     1.170        diameter u
_ _  _________________________________________________
    |  np1 *  |         |         |         |         |
    |  100    |    0    |    0    |    0    |    0    |   Initialized to 0
_ _ |__np2____|_________|_________|_________|_________|
	|\
	| -npar    30 particles (npar) combine from ip=1 (ip1)
      -npar  \        to make 15 pairs of ip=2 combo particles
	|     npar
_ _  ___|________\____________________________________
    |  np1    |   np2   |         |         |         |
    |  70     |   15    |   0     |    0    |    0    |
_ _ |_________|_________|_________|_________|_________|
	|          |  5 particles (npar) combine from ip=1 (ip1) & ip=2 (ip2)
	|__________|_________     to make 5 ip=3 combo particles
      -npar      -npar     npar
_ _  ___|__________|_________|_________________________
    |  np1    |   np2   |         |         |         |
    |  65     |   10    |    5    |    0    |    0    |
_ _ |_________|_________|_________|_________|_________|
	|                    | 2 particles (npar) combine from ip=1 (ip1) &
	|____________________| ________  ip=3 (ip3) to make 2 ip=4 combo
     -npar                -npar      npar   particles
_ _  ___|____________________|_________|_______________
    |  np1    |         |   np2   |         |         |
    |   63    |   15    |    3    |    2    |    0    |
_ _ |_________|_________|_________|_________|_________|
	|                              |   1 particle (npar) combines from
	|______________________________|_________ ip=1 (ip1) & ip=4 (ip2)
      -npar                          -npar       |  to make 1 ip=5 combo
_ _  ___|______________________________|_________|____   particles
    |  np1    |         |         |   np2   |  npar   |
    |   62    |   10    |    3    |    1    |    1    |
_ _ |_________|_________|_________|_________|_________|
0    filp=30    filp=60   filp=90   filp=120  filp=150    File Position #'s
							  30 char per npar =
			       :                          30 x ip's
			       :
			       :
		  ip1                ip2
	 1         2        3         4         5         6    ip's # of Combos
_ _  _________________________________________________ _________
    |         |         |  np1    |  np2    |         |  npar0  |
    |  100    |   90    |   80    |   70    |   50    |   40    |
_ _ |_________|___55____|_________|___35____|_________|___75____|
		    |                 |                    ^
35 particles (npar) |-npar -npar      |                npars=75
combine from ip=2   |_________________|                    |
(ip1) & ip=4 (ip2)  |\       /|                            |
to make 35 ip=6     |  \   /  |                            |
combo particles     |    +----|-----------------------------
to be added to      | npar=35 |      + npar0=40
original npar0 =    :         :
40 = 75             :         :