Dakka member "
MrMoustaffa" has tried this already; using
Victoria Lamb's lasguns, and arms with lasguns, with them, since the cadian arms and guns would look way too big on them.
I think they look pretty damn good myself, especially since you get a decent range of poses from the kit, even crouched and prone poses. You may want to use Vic's not-meltaguns and not-plasmaguns or the Death Korps of Krieg weapons from forgeworld with them as they are much better fits in terms of scale.