TFA is primarily designed for guns; Weapons that do not typically fall into this category (Newton launcher, Poltergeist, etc) will not work easily on the new base. It is recommended to continue using the vanilla base for such weapons.

For simple guns that do fall into this category it is rather trivial to port to the new base:

• Derive your SWEP from weapon_tttbase_tfa
  
• Convert the delay value to RPM
  
• Rename Primary.Delay to Primary.RPM
  
• Rename Primary.Cone to Primary.Spread