Many thanks to Toolmonger reader blurdo for suggesting the Wolfcraft drill guide when I was looking at a model from another manufacturer. When I finally checked out the Wolfcraft in detail, I found that in addition to the sturdy all-metal construction and the stop that he mentioned, this drill guide will also handle centered-edge drilling.
This saves me the headache of deciding whether to purchase the cheap-ass doweling jig I’d been considering; now I can just wait to get a good one when I can afford it. I’m getting the drill guide soon for building the recumbent, anyway — this guide’ll make it much easier to build a jig to hold everything while I weld. Plus, it looks like Amazon’s got it for $24. Thanks again, blurdo!
The drill guide manual also details an under-bench mounting of the guide for edge sanding, in case you need it.