I had a few ideas while playing poland in this mod,
No.1: There should be a 9tp which is a modified 7tp with better armour and engine and 10tp, mabye a TKD which is a TKS with a light 47mm howitzer or TKS-D which is a TKS with the 37mm bofors.
(10tp prototypes were made and 1 potentially saw combat the protype was fully operational with 37mm bofors and engine, 4 TKDs were made and 2 TKS-Ds were made both TKD and TKS-D were used in the invasion of poland)
No.2: There should be the C2P Light artillery transport which is a TKS converted to be able to transport artillery it chould be able to transport light aritllery or at guns in this mod and a C7P which is a modified 7tp to transport artillery and should be able to carry heavier artillery and at guns
(151 C7Ps were made and used, 196-310 C2Ps were made and used)