For Aerial Mod: Jet-assisted Flight, the text says that you use 2/3 of the "basic speed" for the jump speed.  I've always assumed that this meant "final land speed" (i.e. after all adjustments + or - to the initial speed).  However, a stricter reading (that Paul uses in his spreadsheet) might suggest it means the "base" speed before subtracting armor (unlikely) or the "adjusted base" speed only taking into account armor (which Paul uses).  Which is it?

So, if a mech had a base speed of 16, which got decreased to 11 after adding 5 points of armor, and then got increased to 12 by paying EM's, which speed do you use to calculate jump jet speed?  11 or 12?