http://www.dakkadakka.com/dakkaforum/posts/list/93.page JForum - http://www.jforum.net http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1582299.page http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1582299.page GMT
Most people take that to mean whatever model and base size would be used if you hadn't taken a mount at all(and is probably the best choice supported by the rules).]]> http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1582311.page http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1582311.page GMT mm vs 25mm depending on the army book specifics.

Example: a skaven warlord is on a bonebreaker rat ogre on a 40mm. bonebreaker dies to shooting. the warlord drops down to a 20mm base.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1582680.page http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1582680.page GMT
Also if you have a model on a Monstrous Mount or Chariot you should always have a version of that model on foot.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1586096.page http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1586096.page GMT GW has stated that you can put a model on any "reasonably-sized" base, as long as it is no smaller than the one listed. So...yeah. Just keep a 20mm size one around or whatever.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1618287.page http://www.dakkadakka.com/dakkaforum/posts/preList/295456/1618287.page GMT