Offroad-Express

hey went for the ols W O F today failed as the bottom bolts the
rear disc calipers were in the caliper but not threaded in to the mount ,
anyone heard of these thing backing out , or is it just my problem

Yup, had it with mine after doing 2,000kms rally recovery last year. One bolt was totally gone, caliper had lifted up and was getting friendly with the rim.