Some of the bases are designed to be installed from UNDER the turret roof, and as far as I know the Tamiya kits have a spot they fit into.
Apple diameter is 1-1/8", and at the widest point of the lugs, 1-1/4" . I don't use that base, I use the white ones from Curtis / Clark.. sorry I cannot measure those.
I DO know that a regular Tamiya apple won't fit inside a HL Tiger, Panzer 3/4 hatch without some mods... :/
Tiger I - Panzer III - Panzer IV - Chi Nu Kai - Panther G - KV-1b 756(r)
M4A3(76) Sherman - T-34/85 - M3 Grant