Folks,
I've got a little Kity 419 and while small (8" blade), I like to be as careful as I can be.
First off, my push blocks are homemade. I use 18 mm ply with the bottom covered by a trimmed rubber mousepad. That's about the strongest grip I can imagine. The handles are either hardwood or 18 mm MDF, cut to shape on the bandsaw and then routed to soften the edges. I'll have to think about adding a retracting rear catch... neat idea.
For a push stick, I either use the plastic one (although, not for long after that story... eek!) or an "over the fence" one similar to the fence-straddling tenoning jigs I've seen some folks use. It keeps the fence between my hand and the blade, although it requires the use of a featherboard.
Lastly, and best of all, I splurged on a set of BoardBuddies (
here), along with their track. The whole unit slides neatly into the top groove on the Kity saw fence (just used four standard M6 bolts with wing nuts).
The thing is fantastic. It holds the boards down (reducing the chance of the old "lift 'n throw") and pulls them toward the fence. As well, they only spin one way, further reducing the chance of high speed wood poisoning.
Hope that helps.
Thanks, Jim