Good morning Don Sir..and actually she is equipped with twin anchorage system, as two fishing line passes, through two ball point pen refils, attached at each end, and driven by a reworked micro servo, for actuating the weghts attched to fishing lines..so, when we depoly the weights by actuating micro servo, the weights goes down and stops her in one place..but i temporarily dismantelled those weights and servo, to make her fast as you see in videos..and will attach it all back, as i finishes my quay side at my back yard Sir..thank for the advice..have a nice time..