I did a bit of online research on European dado/housing usage. The limitation rationales are quite valid. As a 77 year old I grew up on powered saws and always took the riving knife off. But, instituted other safety measures to minimize dangers. One concept never discussed on this controversy is a third solution never considered. Decades ago I had two special carbide table saw blades made with 1/4 inch (6.35 mil) carbide cutters. They were for a special project which didn't succeed. I gifted one of the blades to a wagon wright friend and stll have the other one. I doubt that such blade widths are commercially available. With your ingenuity I am sure you can easily reason out how quickly and safely this job could be accomplished. If we were neighbors I would pop over with the blade. I am sure that the blade arbor dimensions don't match. I suspect that the cost of the stacked router kits and invested set-up time would come close to the cost of one wide carbide tipped blade. Interesting concept to reason out a design. The concept might be a no-starter also since the riving knife is removed to allow for clearance. Gaz

Again, one of the values of your channel is your willingness to demonstrate the shoppe necessity of working with available tools and equipment to fix problems. By explaining intent, failures, and successes all the viewers can accept without question their similar efforts with differing issues. Irregardless of shoppe size or equipment, we all share the same issues. The other wood craft channels portray themselves as always having perfectly functioning work spaces. Also, other channels simply have magic powered equipment which is perfectly set up when precisely needed. Younger craft members are left to work out problems without guidance. The result is many dangerous practices being peddled to less infomed viewers. The absence of music greatly aids the explanations. Stateside we use a stacked dado cutting set on a table saw to perform this task with cuting blades set up for tolerances. No judgement on relative ease of use or accuracy. Both set ups are time consuming and easily prone to hurried error.