Hi! Earlier this year I had a problem with gas seeping out of one of the overflow pipes on the float lid of my BT7 Tricarb. I replaced the needle valves, which were a bit worn and the problem disappeared. I did however experience some rough running so I went ahead and adjusted the floats. It proved difficult to get a correct distance between the lid and the float and when I finally managed the angle of the metal bracket did not seem right, and the needle on one carb occasionally got stuck because of this. I ordered the newer all plastic floats hoping that they would fix the issue, but when I installed them I noticed that they would not allow the needle valves to open. In fact they kept the spring loaded plunger on the needle partly depressed even when they were in their lowest position (see pics). I am beginning to suspect that I installed the incorrect needle valves and that they are too long, which would explain all the issues. Has anyone experienced this problem and does anyone have the correct dimensions (length) of the float needle for the HS4?