Brilliant! Now, I didn't want anything quite that large and I didn't have the bits on hand to make something like that anyway, but I did have an Imperial Guard Sentinel so I set out to make a smaller version of the vehicle.
Why a harpoon launcher? I wanted a relatively low power weapon (rather than a Las Cannon, etc) and it just seemed to fit. When I found the extra spear mount for the side of the hull, I was sold! I'm not exactly sure on the stats I'm going to use, but I may just pull from Gorka Morka. It is easy enough to switch out for another weapon if I want to change it out in the future.
The vehicle weighs in around 135 points and carries a crew of two...
Full stats and the fluff on the vehicle is forthcoming when I present the final scenario (hopefully next week).