am I missing a part? the cylinder is 27" for sure measure couple times, has 1 gasket on bottom in the groove, 1gasket on top in jar lid groove and still have this gap when cylinder jar lid is on, jar lid rest on the cast iron uprights, so stacked a 2nd top gskt and you can still barely move cylinder when all together and tight ?? I can cut 1/8" off cast iron uprights but seems missing something. Appreciate any help Laroy