HP2648A tape drive capstans

I picked up a 2nd 2648A in Boise, ID and the capstans look intact on this one (looking into the case from the tape slot). This gives me one crappy unit for spares and one good condition unit for play :-). Now what's a good way to clean the stateful switches on the top of the keyboard? One of the keyboards has switches that don't release without a little manual assistance. I figure gunk has gotten into the switch mechanism over time. I'm *not* going to put this guy through the dishwasher, I'm too scared of what might happen ;-). Also, some people were saying that they had a keyboard "without the tape controls on top", but everything I can see in the 2648A manuals shows that all the keyboards have the tape controls, but your keyboard might not have the key overlay. Can someone show me a picture of the keyboard *without* the tape controls for comparison and get a part number off it? -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>