Some models of Tek scopes came with board populated with parts for features that were activated in upscale models; only thing that made economic sense at assembly. Others at least had the spaces on the MB. (The up-scale had a diff. model designation and new front panel, in some cases - maybe extra switches. So it wasn't quite as simple as flipping a switch from Redmond, say.)

All moot now, out of production - and the how-tos are Out There, too.

But it just Sounds awfuller when one knows the personalities behind it. And their non-prison (yet) record.