Christophe,
Nice looking and a lot fancier than the one I use for recutting small parts that are too short and too dangerous an operation to do the normal way. The protected enclosure on the backside is a clever idea and makes it a lot safer than what I use. I will add this my sled. The only change I would suggest is to replace the bar above the blade with a small piece of clear plexiglas sheet so you can see the blade cut progress all the way through and also see when things are binding and about to go really dangerous.
Thanks for showing this design