I messed up
Yep big time, got things wrong, was not Safari today but Valley, so having got there was not going to wast it, so after a little play decided the time had come to do a realistic test, put the anchor at the top of a fair hill and drove in 5 pins (only five as ground was quite good) ran motor to the bottom and attached the winch rope, started winch and found as the motor started to rise up the incline that the winch was struggling, so stopped and inserted a block to double the pull, checked the anchor, not moved at all, continued winching, still a hard pull as we got to the steeper part of the climb, this is the anchor at the end of the pull