sumps,
Not at all, just never heard of a thing called FLECS when I was in, that's all.
In my day it was a fairly straight forward case of first line on the Squadron led by a Sqn Ldr SENGO and 2 JO JENGO's, second line at Eng Wing level led by a Wg Cdr OC Eng and 2 x Sqn Ldr OC ME(A)S and ME(G)S.
After that it was an MU for third line.