Here's a WIP of my version of a popular conversion, a Vendetta. For the wing-mounted twin-linked lascannons I've strayed from what I see is the norm by using a razorback turret lascannon. This is an extremely easy conversion as, other than the cable, there is no significant cutting or trimming required. There's already a left and right side lascannon, they're made to fit together side-by-side, and both sides are flat and almost the perfect size for adding a lascannon power supply. Except for the magnet (and nail, explained later), all parts are shown here in the right picture. The finished lascannon in the upper left is how it looks with all parts in place.
For some reason, I was trying to reduce my magnet consumption when I came up with this conversion, so my attachment method may seem odd. However, it does show another way to get it done and, if done correctly, it's quite sturdy. I drilled magnet holes in the wing pylon coming in from the front and back. You can see here they are flat sides to the front and back. Once I glued the magnets in I drilled two other holes straight in and deep. The difference in my method is that I glued a nail in the lascannons, missiles and missile pods, and that guides it and helps hold it in place. You can see the finished result in the picture to the right. The nail pieces fit into the holes and are held in place mostly by magnetism, but also by friction. This not only keeps them in place, but also makes sure they are hanging straight.
I've done it with the other weapons as well, so they can be swapped out at will. There's more involved with this method, but it's a good solid hold and I'm more comfortable with the fit. I made two mistakes while figuring this method out that I would change for the next time. I should have gone with a longer nail, as that would have made for a more solid fit. And, I didn't measure the width between the two holes on each pylon. This leaves me with two sides that are not interchangeable; the left side only works on the left side, and the right only on the right.
The hull weapon conversion is pretty straight forward, using a magnet on a piece of plasticard in the hull nacel. I went ahead and purchased extra hull weapon bits, added to the order during another bitz buy. Minimal work this way, and I still can have a single lascannnon mount, as well as a twin link version. WIP effort pictured here as well. I have some thoughts for the other bits that came with the lascannon bit, but am not sure when I'll be getting around to working that idea. Hopefully that won't linger long.
I need to finish off the crew, and work out some bugs with the way my heavy bolters connect, then the Valkyrie will be ready for final painting. More to come on this, hopefully soon.
One of the few recent pieces I actually consider finished are these Regimental Advisers. My son wanted to try them out in a game, so we got a set and I painted them up. I liked the looks of the Master of Ordnance and Officer of the Fleet, but I wasn't sure about the Astropath. In the end, that was simple and the one I enjoyed painting the most. After applying white primer, I washed the outside of the cloak a couple times with GW Asurmen Blue, and highlighted with a Vallejo sky blue. The inside of the hood and the sleave cuffs are Bleached Bone with a wash of Gryphonne Sepia. The Astropath has had a sealer applied; I'll seal the other two this weekend. 
