Explanation of columns in spreadsheet JGW-E1504443

A: Major section, e.g., TM/RM for optic and recoil mass
B: Level, 0 for top level, and increasing by one for each level of nesting
C: Type of item, one of
	A = Assembly
	M = Manufactured Part (Unthreaded)
	T = Threaded Part
	C = Commercial Item, e.g., Picomotor
	F = Fastener (Male, Threaded)
	N = Nut (Female, Threaded)
	W = Washer
	P = Pin
	PW = Piano Wire
	MW = Maraging Wire
	O = Optic

D: Inventor part name, exactly as in Inventor (spelling must be exact)

E: Level 0 Quantity, number of top level assemblies to be built, typically 1
F: Level 1 Quantity, number of level 1 items in top level assembly
G: Level 2 Quantity, number of level 2 items in current level 1 assembly
H: Level 3 Quantity, number of level 3 items in current level 2 assembly
I: Level 4 Quantity, number of level 4 items in current level 3 assembly

J: Total Quantity (computed automatically using columns B and E-I).

K: The part name on the drawing pdf
L: The material, and, for fasteners, whether vented and/or coated
M: Held part - for fasteners, the part with unthreaded holes that the fastener holds to something else
N: Part with Threads - for fasteners, the part that the fastener screws into

O: Mating Thread Material - for fasteners, the type of material the fastener screws into 
	- computed automatically by looking up column N in column D and returning column L
P: Mating Thread Row - for fasteners, the row number of the item that the fastener screws into
	- computed automatically by looking up column N in column D and returning row number.
Q: File name - for manufactured parts, the name of the drawing PDF file.
R: Notes

Any parts that are tools or alignment aids for use in installation only and will be shared between 
suspensions are in a separate section at the bottom.

The OSEMs have also been moved to a separate section at the bottom.