So say you are attacking with Autoblaster Bossk.

You roll 2 hit's and a Crit, they roll an evade to evade the crit.

Because the attack hit's can you then cancel that crit to add 2 hits?

You have rolled a Crit and it is also an attack that hits. The wording also does not say "you may use one of your uncancelled crit results to add 2 hits"

In autoblasters case, if the defender rolls evade result so that crit result IS cancelleed. Cant use to change to 2 hits then i guess

I thought as much, just seeing how scummy I can get with "Scum" =P

The dream of 4 hit autoblaster Bossk tho

Altho a 5 hit HLC Bossk is just as fun.