It might take Wart On to take months to fit a smoke-pod to a Hawk, but at their birthplace Dunsfold, it was rather less.
I should know, as my father Stan was in charge of fitting the originals !
I would think smoke pods, not Hawks, are the rarity.
Incidentally, Reds' Hawks have a modified throttle for fine movement adjustments, I've flown in such an aircraft with an ex-Reds pilot, in very close formation with another Hawk.
Later, in my day, we were asked by an African Hawk customer if it would be OK to pipe 'Genklene' - Tricoethanol, now banned - into the jetpipe.
There ensued the fastest international phone calls in history, as this stuff when turned into pretty white smoke is Phosgene gas !
We had another request for green smoke, which led to a static Hawk trying various dyes in the basically diesel smoke pod.
Our best result was met by a seriously ballistic phone call to Dunsfold's airfield manager; it was a calm day and we'd managed to dye this woman's hanging washing bright green !
So success can be measured by various scales...
DZ