have you found a effigy or picture of another kit for what your shooting to look like? can we see it? 
Looked a bit here:
http://www.themcs.org/armour/14th%20century%20armour.htmIt's interesting, the predominant style is still the mail and longer surcoat up into the 1330's, with some mix during that decade, then mostly plate and mail mixed by about 1340, with the 1340's still having surcoats around knee-length if they have them instead of a shorter coat of plates. These longer surcoats persist up through the 1350's on some effigies. Everything is mid-thigh or crotch length after 1360.
The earliest case of plate with rondels over mail is about 1323 though. In the mid 1320's there's at least one case with a jack-chain style of rudimentary elbow and shoulder cops over mail instead of plate, with mostly mail persisting into the 1330's.
Mail mittens still seem to be the most common until the early 1340's, though at least one effigy in the 1320's has what appears to be heavier gauntlets. Around 1350, demi-gaunts and some sort of heavy glove seem common. Progressing through the 1350's and 1360's, hourglass and Wisby style gaunts show up.
So depending on which decade I'm looking at, I have a lot of options. Once the simple plate starts to appear, it's not long before more ornate stuff is on the scene, so it's more the surcoat and coat of plates that changes during these decades. The rondels on the elbows become scarce later in the century, but can still be seen as late as the 1380's.
I could aim for somewhere around 1350, and have a mid-thigh to knee length surcoat, mixing mail and plate with the rondels, and a bascinet, and it would be in period. I could potentially put a demi-gaunt over a glove and have that work too.
