Is there any concrete rule which requires models to be on specific bases?
A fellow player whom I've never actually battled decided to criticize and argue about my Black Templar character on a bike. The bike was on a heavy weapons team sized base. This was necessary because I made it into a chopper with extended forks so it'd not fit on a bike base. Also because I didn't have any such bases!
His view was this base made my model illegal and he would not allow it in a game if he played me. Basing his argument on the assault phase.
I pointed out to him that the size of the base really doesn't matter. In fact, the base's larger size would be a negative for me in assault. Since models have to be in base to base contact anyone assaulting my Templar would be able to put more models in contact with him than if it were on a normal bike base.
Anyway, to me this kind of nit picking nonsense irks me and so I want to know if there actually is a rule about base size.