The Trim do not use the screws like BVM. I have not had any problems with tires coming off the rims. I also have not had to replace any tires yet, I guess cause they have not locked up constantly like the Glennis so I have not worn flats all over them. Why don't you want to deal with the Glennis guy? He always seemed nice to me, just over priced for replacement parts and not very timely on shipping.