The thing about "adjustable" things is that they can get out-of-adjustment without you noticing.
Something like this would be ok if you needed to change a lot, but in a production shop....no way.
We have "sets" of shop made jigs. (one for base and upper doors, one for drawer fronts, one for tall doors) These are for the most common sizes 96mm, 4", 128mm, 192mm. I use the metal inserts from Lee Valley, like the ones cheese pictured above. I drill most of the way through, all down the line, then come back and drill the rest of the way with a backing board.
Taping over extra holes is a good technique to get in the habit of doing. This is especially important with shelf pin jigs. It is very easy to drill them wrong too.