NOW: Powerlink topstays have a patented Fit-Design, with hinged connectors at either end accommodating any mounting angles at the boat hull and any pitch angles of the oarlock pin.
THEN: Topstays are factory-bent to fit one particular setting. Change that setting and re-bending in a vice might be necessary. Just tightening the two ends can affect the pitch angle and locally damage the hull skin.
Due to the Fit-Design, pitch angles will not change during the installation of Powerlink topstays.
Tightening the screws or nuts of the length adjustment mechanism can change the pitch angle. After some use, preferred length settings can develop, making small pitch adjustments difficult.
Use Powerlink topstays to “stiffen up” shells originally sold without them.