Frans you could put small blobs of modeling clay (plasticine?) on the mating surfaces rig the aircraft then derig and measure the depth of the blobs. use clingfilm or release wax on the matching surface Graham ________________________________ From: Frans Veldman To: europa-list@matronics.com Sent: Monday, 21 February, 2011 13:23:57 Subject: Europa-List: Aileron play --> Europa-List message posted by: Frans Veldman When we built the PH-DIY the aileron system was tight. But after 91 hours of flying and repeated (de)rigging, everything settled in, and some play developed at the quick connect system. There is no play within the wing itself, nor in the airplane, but it sounds like it really is at the mating surface of the two quick connect surfaces and the surface shows some wear. Does this sound normal? With the wing root fairing in place it is a bit awkward to make measurements and get a visual confirmation. My plan is to add another tufnol sheet on the bellcrank surface to see if that solves the problem. (There is no play on the bearings). Other ideas are welcome of cours======================