1500 pt Battlewagon list

Here's a list I'm considering for the upcoming Astronomi-con tournament in Oakville (May 1-2). I'd like to use my orks since there will be too many space wolves and the new blood angels codex hasn't been out long enough.

Anyway, I've got 4 battle wagons, and with the new ork faq I think the deff rolla is the thing to have. I'm also a strong believer in ork boyz, so here's what I've come up with. C&C would be most welcome.

HQ
warboss, power klaw, attack squig, skorcha, bosspole
-110
big mek, kustom force field, bosspole
-90

Troops
20 shoota boyz, one upgraded to nob with power klaw, boss pole
-160
20 shoota boyz, one upgraded to nob with power klaw, boss pole
-160
20 shoota boyz, one upgraded to nob with power klaw, boss pole
-160
11 shoota boyz, trukk, red paint job
-106
3 mega nobz, 1 skorcha, 1 rokkit, battlewagon, deff rolla, red paint job, boarding planks
-254
Deff dread, +2 dccw
-105

Heavy support
Battle wagon, deff rolla, red paint job, boarding planks
-120
Battle wagon, deff rolla, red paint job, boarding planks
-120
Battle wagon, deff rolla, red paint job, boarding planks
-120

total: 1496