Sony CRT RGB Mods Written by Brendan Eddy (FlyingFlygon) For a guide on modding BA-4D chassis televisions (KV-27S42, KV-13M42, etc), see the BA-4D folder. For a guide on modding BN-1 chassis televisions (KV-9PT50, KV-9PT60, etc), see the BN-1 folder.