new marine conversions

I improved the sergeant for my first tactical squad.

I could not miss to add a power fist!

I also wanted to add to it extra veteran features from the SM Commander set.

I then added some servo skulls, I was inspired to do it by the old Iron Father model.

The second model I created was a "compulsory" conversion time I had when I received my new pre-heresy SM helmets from Maxmini. I also added a very devorative shoulder pad from a BA special character.

The SW chainsword fits better than the classic SM one to represent an ancient weapon.