Likely alot of folks already know this, but I stumbled across it last night.. so i thought i'd mention it..

If you tap the 910xt twice, the back light comes on for a brief period....just on the screen no need to press buttons..

It may be clear in the instuction but i didn't pick uip on it or remember it.. and its made checking progress in betwen set prompt distances alot easier...
Was pleasantly surprised when it happened....

Still won't reliably display Stages power data when on the arm tho.. pooo..... ah well can't have it all..