Thank you gents for the constructive assistance.
I’m going to have a go at making one of the four rams todays using the timber.
I’ve recently bought some Bubblechute Shop Wax so will polish the piston rod with that for smooth operation in the cylinder.
All the cylinders are 4.5” (115mm) to 5.5” (140mm) in length.
Life’s Good, Enjoy Each New Day’s Blessings