I contemplated mounting the lights under the roof but it seemed like it would take a decent amount of fab work to make it work with my cab. (W/O the cab it is easy) My wiper arm is right in the way and already hits the cab roof when the window opens for under-hood access.
On the back side it might be easier. There are these type of [ame="http://www.amazon.com/Signstek-Headlight-Waterproof-Dustproof-Shockproof/dp/B00FEE17X6"]low profile 18w LED lights[/ame] that look comparable.
Looks like you are well outfitted Mark! I would have loved to mount mine under the roof like that. Glad you are liking it.