You do not want the coils for the PT3, T3s, Mt3s or MT3d.
Why is this ?[/QUOTE]
PT3 coils are dual, and won't fit. MT and T3D are also dual coils, and won't fit.
T3S coils are single, and have a slightly smaller diameter on the "washer" at the bottom, and will fit. They may work fine, although some have reported problems with them leaking. I've not had that problem, and have used them in the PT, PT2 and Davides that use single bottom coils. YMMV.