Thanks for the call.
Our naming system is confusing for people who arent deeply involved in the gear, apologies.
The initial in the front of the numbers are what type of apex, V in the middle means its a versa, F in the middle is a Fixed, and if it has a T on the end it has a taper made specifically for the Anvil-30 ballhead.
The first number is the series of the tripod and the second number is how many sections there are.
If it has an L or and S after the number it means there is a sibling tripod with the same numbers but this one is either the Longer version or the shorter version of the sibling.