I had to replace the reservoir on my Speedy and acquired one from JBugs that was supposed to be the same except for the barbs being at an angle instead of pointing straight down. No big deal, I had to relieve some of the fiberglass with a Dremel coarse sandpaper wheel where the reservoir is mounted in the frunk so I could attach the German rubber woven brake line with small clamps. I went to attach my Motive 0104 Air-Cooled Brake bleeder that I used on the old reservoir to the new one, the filler hole on the new reservoir is minutely smaller than the old one and the cap from the bleeder to the reservoir won't screw on and seal, it is just a smidge too large. Funny thing is that the cap from the old reservoir does fit tightly on the new reservoir so I am making that into a cap for the bleeder system.
Every small change seems to drive another issue!