I’d be making my own guide block. The drill guide you’ve linked seems good, but my experience of these was rather poor. Setting angles is “close” in terms of accuracy, setting up to do a line of holes is bothersome unless you mount it to a separate base and reposition the work piece for each hole, which in itself can introduce some deviation even if you are being fastidious.
the version I bought from Carbatech also suffered from induced angle caused by the weight of the cordless drill attached to it.
The version in your link seems slightly beefier than the ones I have seen and used, but I would still harbour doubts about it.
You’ve got a drill press, grab some Aluminium plate or some solid hard wood and make a drill guide.







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