When I visited last year, the Burnt Mountain fire tower was still standing. The cab was locked, and trees (hardwood, so climb in winter) have grown up largely obscuring the views, but you could see the lakes to the north. When I return, I'll bring a pair of slings to tie in a bit better -- it was windy, and the rungs are rather slippery and widely spaced. As it was, I was unable to take pictures or bearings while up there.
Still, the cone mountains were visible from the "backside" clearing -- a stumpy, slashy area looking southward over McCarty field area. I believe the mountains in question were not Doubletop. They was much too distant -- I'd estimate something like 50 miles based on haze, with maybe 5 miles between the two of them. As far as the Katahdin massif is from Burnt, it's maybe 4x that far to this. Look left of Soubunge, right of Strickland's shoulder.
Or try Google Earth. I'm a Worldwind guy, but I tried GE last night -- putting the viewpoint at Burnt, then tilting the world to give a pseudoview. Point the camera in the Spencers' general direction, and you can see what I saw. Doesn't prove you can see it on the ground, though.
Now you've got me second-guessing that it was Doubletop... Guess I will have to dig up that picture!