OK, I'm ready for this one to head off topic, but here goes.
I have the old version of the Xcalibur cabinet saw, I believe it is a clone of a Delta Unisaw. The riving knife on the saw sits significantly proud of the blade. Over the weekend I was watching a few YouTube videos and I stumbled on some polished by Sawstop. On their saw when using it to make non-through cuts (not with the dado stack which is does take, but just the standard blade) a riving knife can be fitted that is no higher than the blade. This replaces what on the videos they call the blade guard, but what is in fact a taller riving knofe to which is fitted the blade guard which is combined with overarm dust extraction.
A couple of questions spring to mind.
First, does anyone have any experience of a saw with a similar height riving knife? I'm pretty sure I have seen other YouTube videos posted from the US with a riving knife that is not higher than the blade, but can't recall seeing or hearing about anything from the UK.
Second, any thoughts on the feasibility of creating such a riving knife for fitting to a saw where the standard riving knife sits above the blade? Of given the way the blade rises and falls in the saw would the riving knife end up changing height relative to the blade. Could such an issue be addressed by creating a riving knife with the right shape of curve at the top?
Anyway, any thoughts on the riving knife question would be much appreciated.
Terry.