Gary ...good description,I would like to correct 1 and add 1...TCM fuel pumps use 2 carbon type blades...opps are same as gears would be.TCM manifold valves have a spring loaded poppet valve in the center of the shaft that is set at several pres. and flows from idle to full power unlike the LYC.that opens more rapid and has a total flow well beyond engine needs they mainly keep a constant head pres.and aid in idle cutoff. For LYC. there is a precision SB for a stiffer spring for the flow divider that increases head pres. and helps rough idle hot day problems a little.
not nit picken just adding to your good work.
Gene Martin