THe transparency bmp's could need some clean-up, remove some, but not all of the white(ish) pixels on the edges. The 3rd bmp in the 1st row - the USCG patrol boat - definitely needs more details.
I tell you what, you need no help - "All you need is just a little patience" (as Axel Rose once sang in better days of his) - you've made it that far, you can do the rest as well.Trial and error and many saves, that's the key.
Talent is there, plenty.
"A big butcher's bill is not necessarily evidence of good tactics"
- Wavell's reply to Churchill, after the latter complained about faint-heartedness, as he discovered that British casualties in the evacuation from Somaliland had been only 260 men.