I got that the screw's intent was to hold the insides in. What I was questioning (suggesting) is that the diameter of the screw meets the ratty edge of the two nylon shoulder washers. Is it intended to contact the shoulder washers? I'll assume that you don't want it to contact the green shaft. And also that it threads into the blue body.
Have you seen screws in SES tubing and hubs work themselves out? I'd suggest a split lock washer, or perhaps Locktite.
But looks like a workable plan all considered.
Robot Dude wrote:
Not sure of intent of screw into foot hub were it contacts nylon shoulder washers. You've indicated the contact closure to be down between foot and hub, however it could also be accomplished between the two nuts and the top hub if spacings were adjusted. Keeps contact in-closed, and out of the dirt.
That screw holds the sensor in the tube. Without it the whole assembly would slide right out of the tube.
EDIT: I totally misunderstood your suggestion. I rewrote my reply...
This example is for the shortest aluminum tube we offer. We plan to use this sensor on tibias made from longer tubing. So even if it would work for this leg, it wouldn't work for the longer ones. However If I made these parts there is nothing preventing modification to move the switch up inside the tube though. I mean the hard parts would be done anyway.