3D designed and printed set of corrected early horizontal stabs (set 48189) and our aileron and flap set (set 48191) combined to save you money if you want both.
The set also comes with a jig to reposition the tails further aft on the kit where they are supposed to be. Some people may not care and leave them as they are. The attachment point also has a hole in it so you can add a length of rod to reinforce the tails if you so desire.
The one thing that differentiates the early stabs from the later ones are the strengthening straps near the leading and trailing edges that were added on MSIP II jets and through the entire Strike Eagle and later series of jets. These straps helped alleviate cracking due to fatigue. Basically, if you are building a pre MSIP or MSIP one jet these are the stabs you need.