OD&D Sprites player character race

Transcribing from my 70s campaign notes. It's a straight mechanical description with no fluff. I think I solo gamed one and maybe had one or two players play them at some point.

Sprites (Pixies)
Sprites are small, frail creatures with human form and gauzy wings. They are generally between one and two and a half feet tall. (I made them bigger than a lot of legends or fiction would have it, so as to make it conceivable to have them in a D&D party and actually fight.) Sprites have an intrinsic knowledge of hedge magic (In this campaign, hedge magic was a second magic system that was available as generally weak innate magic for a variety of characters outside the conventional magic user class. I'll probably detail both it and the house rules spell points magic system in the future.) They have the ability to become nearly invisible and can fly. They can be fighters or thieves. As fighters they have a four sided hit die and a maximum of 7th level, as thieves a three sided hit die. (Greyhawk HD were in effect)

Sprites are very limited in carrying capacity because of their small size and flight.
Weight (in gold pieces, not pounds)

G.P.	Movement
750	3"
600	6"
450	9" or fly 6"
300	12" or fly 18"

Armor weight (in G.P.) >

Helm	15
Leather	75
Chain	150
Plate	250
Shield	50

Usable Weapons
One hand: daggers, handaxes, darts, javelins, shortswords
Two handed: short spears, maces, swords, hammers, light crossbows

Sprites have a basic 50% invisibility with an extra 50% (I'd probably make this a bit less now) if there is a varied background such and trees, bushes, rocks, or large amounts of people or clutter.

Thief Bonuses
Open Locks 5%
Remove Traps 10%
Pickpocket 15%
Move silently 20%, 5% if flying
Hide in shadows 50%* (they're half invisible in a typical dungeon)

Sprite fighters are a hampered somewhat by their low hit points and inability to use large weapons but this is offset by being able to attack invisibly on their first round and being able to choose the body part to attack on that round with a 50% chance of success and hitting an adjacent part if this fails.