I've done some converstion of Land Speeder for my Imperial Guard, since I don't generally use them in my SpaceMarines. Might as wll use my oppertunity to convert IG operating a current Land Speeder or Mk. 2 Land Speeder. If I have to I'll use my storm varients in a normal game using codex SM, but I'm preparing my IG and SM for he horus hersy campaign @ my local GW using Age of the Emperor rules (which it includes the Imperial Army and mechanicus army and primarch, not just the legions astartes/titanicus or agents of the time)