Sugino seatpost binder bolts are supposed to be bulletproof, compared to the asploding Campys.
I've also been quite nervous about a seatpost "grub" bolt that is on my 1984 Peugeot PSV. It's a small bolt (smaller, I think, than the standard waterbottle mount bolts) that through a threaded waterbottle type boss and hole at the back of the seattube, jams against a groove on the back of the seatpost. To anchor it. It never gave out or slipped on me in the 35 years I have owned and rode the bike, but If might eventually do something bad on me during a ride and the wrong bump or pothole on the road. My proposed solution would be to find a 26.4 mm seatpost that has a quill wedge on it, so it will take most of the load off the grub bolt. I figure, the same solution should work for a constantly dlipping seatpost on a bike with a standard seatpost clamp. The seatpost clamp bolt will not have to he tightened so much then to maintain proper seatpost height.