I don't recall inside diameter of snap, but perhaps a pop rivet would work? Maybe smaller size rivet? I understand your concern. I used sheetmetal screw and no problems after 350 hours use.
I used to travel for business to La Chaux-de-Fonds. Have wonderful memories of Swiss...
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC
1130 hrs Flying 46 Piper J-3 Cub
RV-12 E-LSA #120058 AWC Jul 2012 - Bought Flying Oct 2015 with 48TT - Hobbs now 406
LSRM-A Certificate 2016
Special Thanks to EJ Trucks
Last edited by Piper J3 : 10-13-2018 at 06:54 AM.