Hanskrampf wrote:You can use them with 25mm bases in 7th edition
40k.
Only rule mentioning base sizes is: Use the model with the base that it was supplied with.
So your old Terminators can still use 25mm, because they were supplied with it.
I can see how that works technically, but is it going to go down well at my local
GW store if I turn up for a game? Bearing in mind a decent percentage of the players there likely weren't born when that set was released