No, I have a RIB pax seat swivel base no problems. However, I do have a RIB ALTAIR rock n roll 130cm seat and 1st time in use the welding of the ratchet assembly to the frame of the seat base broke away - had to strip the seat base down and have it re- welded. The guy fhat did my welding said that the original weld had not penetratrated the steel enough to effectively create a weld.