For those that tested Whir of Invention, what was the result, I think the card has promise, but it does seem like it constrains you mana wise on number of non blue lands. I don't know if you want to try and play it with no ancient tombs, or perhaps with some number of pentad prism, maybe even with mox diamond?
I do like the idea, especially when I realized that LED has no tap symbol on it, so works very well with the card. I think being able to end step get painter/grindstone into play without having to expose yourself to surgical extraction (I am looking at you intuition) seems strong, but it means a big change to the deck. It, however, might be worth it.
EDIT:
First pass at a whir list:
//Combo
4 Painter's Servant
4 Grindstone
1 Tormod's Crypt
//Protection
4 Force of Will
3 Goblin Welder
3 Pyroblast
//Draw and Tutor
3 Transmute Artifact
3 Whir of Invention
4 Brainstorm
2 Ponder
2 Chandra, Torch of Defiance
//Back Up Plans
1 Wurmcoil Engine
1 Ensnaring Bridge
//Mana
3 Pentad Prism
2 Lotus Petal
3 Mox Opal
4 Seat of the Synod
2 Island
3 Volcanic Island
4 Scalding Tarn
2 Misty Rainforest
1 Mountain
1 Inventors' Fair
//Sideboard
SB: 3 Ensnaring Bridge
SB: 2 Red Elemental Blast
SB: 1 Pyroblast
SB: 3 Tormod's Crypt
SB: 1 Surgical Extraction
SB: 2 Spellskite
SB: 1 Izzet Staticaster
SB: 1 Sudden Demise
SB: 1 Chandra, Pyromaster

