@Bruce,
I'll check out the 100Mhz REF osc next, then.
I did make up an extender board myself for an earlier model of analyzer and that might work, but it's not very elegant, using loose wires for the extension part which is not optimum, but better than nothing hopefully. Certainly worth a try. And there is always the chance of pulling a board out and finding a glaringly obvious blown component on it with no further testing necessary.
Is there any particular care needed in pulling the A10 section boards out? They're not just pushed-in like the ones I've pulled before. They're well-fitted with screws!
Jinxie