The Profil 18's were hot rims and not delicate. They had a unique colored finish and were specialty indeed- Built quite a few of these rim at one time, and they were for 18-20mm tire width only. There was also the really hot Assos rim which kinda eclipsed them all, and a Sun 17 rim which was tiny and drillled backwards on offsets of holes (a mistake).

Slightly larger were the Araya, Saavedra, and the Wolber P. 20 and Matrix ISO. Those were hot times for rim design because these rims were light, fast, and fairly strong when you put them up against the Ergals and the 280's, Sludis. I think people get these big fat pig rims today that are aero and don't realize how good a well built tubular like these above can be, for a fraction of the price. I mean if your racing and you have some veloflex records on a nice oldie tubular rim....its hard to say the new stuff is an improvement as you roll.

The Araya, i believe used rim washers, the Saavedra's did also (you had to clean up and orientate). But I don't ever remember using rim washers in the Wolbers. The rim bed plays a big part in it all and how the nipple seats. Suns were light rims, nearly a copy of the profil 18, but they had to be touched up with a file and took some extra work. the Wolbers in the 18 and 20 were real sweet rims. Good for you. I have rim washers if you feel the need, but they are not really structural by the way, they mostly gave a harder surface.