(19.) Diagonal Fillomino

Apologies for the dry spell. I haven’t had much inspiration, or will, to make puzzles lately, until I thought of this variation. I haven’t seen it anywhere else.
Getting used to this variant will probably take a bit of time. I recommend starting with the example puzzle on the rules page, I like how it turned out.
019 Diagonal Fillomino
Regular Diagonal Fillomino rules.