Nope you should be fine with those, not heard of a cossie actuator being used before though as i thought they had a slightly different/funny shaped rod, is the turbo a standard T3?

Deffinately worth taking it to a tuner to set up and check the fuelling for the mods, last thing you want is it blowing up as it comes on boost for the first time after all of your effort building the car up!

PS... got any pics, got to love a bonus Turbo!