Philly, I've just realised that you've already got the overhead guard.....look forward to your comments.
"No comments on the dado subject Mate?"
What can I say? For me a stacked dado head is the business. Nice flat bottomed housings (trenches, Tony...) light years quicker than setting up a router (but, of course, a router is sometimes more suitable), any lenght of timber is not a problem either with the rip fence or the mitre gauge. Using shims and various thickness of chipper any width of dado can be achieved. One point, when the full stack is mounted there is no room for the arbor flange washer on the shaft. I'm reasonably happy with the absence of the washer due to the solidity of the blades and the chippers. Bear in mind that a dado blade is maybe twice the thickness of a regular rip blade so the extra stability afforded by the washer is not needed.
As mentioned, if respect and good working practice is employed I really don't see a problem with dado blades.
Rgds
Noel