Many old town kayaks come with a power pole adapter on the back, which is intended to be used to mount a shallow water anchor. This adapter provides a way to mount a safety flag in this location, thereby avoiding the need to drill holes for this purpose. The threaded inserts in the Old Town Kayak are ¼-20 threads, and you will need four bolts or machine screws to attach this adapter after printing.  I have included two versions of this adapter, the first is an adapter that allows the attachment of a YakAttack flag mounting bracket to this adapter, which comes with the YakAttack flag. The other adapter povides a sleeve that fits 3/4PVC sched 40 pipe, allowing you to make and mount your own flag for cheap.