PayLoad
I don't do spirals
Purchased two of these (wrong size)
https://www.rocketmotorparts.com/Phenolic_Motor_Liner_29mm_Thick_Wall/p1577809_20536310.aspx$20 for both plus shipping
https://www.rocketmotorparts.com/Phenolic_Motor_Liner_29mm_Thick_Wall/p1577809_20536310.aspx$20 for both plus shipping