Thanks to the robot invasion I had plenty of bodies to skill on, but the unlock was on myself trying to get to the pile of dead people you can see in the background!
And no I didn't skill on a Ek-2600, I used 2 T20(L)s to get through the last half level and the second one died just before the unlock, It took another 30 PED of decay on the Ek-2600 to get there.