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They seemed to take a step backward when they went to the modular XL-100. Speaking of the XL-100, has anyone else noticed that some of those sets contained expensive looking ceramic hybrid modules in place of some of the regular PC board modules? They consisted entirely of surface mount parts, or regular parts that were surface mounted and the entire module were usually dipped in epoxy. Were these original, or sold for replacement use? If they were used at any time in the original production of the XL-100 (rougly 1971-1978) this would have to be one of the first exapmles of SMD technology in a consumer product. I might be able to dig out one of these modules if anyone wants a picture.
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