So, with options for the tail fin still open to change, I needed a way to interchange the Icarus Storm Cannon (longer range 3 shot medium strength) or the Las Talon (short ranged 2 shot Lascannon) depending on the foe. I looked at the kit and this was very simple to achieve. Simple placement of magnets in the nose cannon location and in the separate weapon mounts (thanks GW for a great interchangeable option). See pic above.

More progress very soon, this one jumped to the top of the to-do pile as I love it!