I got around the issue by using a standard M4 nylock nut, the kind without the built in flange. They sit deeper and I havent had a wheel loss issue since changing over. Most hardware stores have them hanging in a bag for under a dollar.
--Joey --Venom Batteries & Chargers!!
Old School Racer & Vintage RC Car nut
RC10CE (X4),B2,B3,B4,B5, B5m, B6D - 10T,T2,T3,T4,T5M - B44.3
BRZ-444, RC10M, RC10L3 oval, L4 oval X 2