World's dumbest DB25 (parallel port) Breakout Board?

[Jonathan]

I only made my original post 'cos I thought some here might think them to be expensive for what they are and they lack optos.

Yep, could make and sell that for a fiver and still have enough profit to buy a drink...

That raises an interesting question in view of the understood wisdom here that multiple optos are bad practice.
Is it preferable to locate the optos on the BoB or the driver board(s)?

You generally don't get a lot of choice where to put them since the overwhelming majority of good drivers have them built in already. However if using drivers without isolation I think I'd prefer to have them nearer to the parallel port since the signals from the port are more susceptible to interference between the port and the isolators, since the isolators buffer them. I doubt there's much in it though...