PERFEKT.

WOW! Hard work ... and worth it.

So im trying the four lower left quadrents and im stuck. found 2 on the bottom right of those 4 quadrents but stuck after that.

Eh just guessed if you get stuck the 4s are at the bottom right quadrent.

Excellent. needed temporaries but clues unnecessary. thank you.

Excellent, used temporaries in the bottom left but got it first time.

Nice puzzle! You don't need temporaries (or guessing!) guys, just think. Where could the 4 in line 16 be without causing inconsistencies?

Looks great! Thanks!

Fully logical and fabulous image. Thank you!