Hi BB and Rolla,

The 14" Model 45 was the baby of the family, mainly for use on small lawns and maybe weight was not a consideration.... whereas the 17" and 20" machines were for use on medium to large lawn where weight was needed for rolling of the mown grass and cast iron was the preferred material. wink

As usual with most things Scott Bonnar, it will probably remain a mystery. cry
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin