Dual ram install
 

The rams extend all the way just before hitting drive extents (it's safe). But, when one ram fully extended the other ram is not fully retracted. It's about 1/8" from being fully retracted. Do they have to bottom/top out together perfectly?

essentially yes. it will take a lot of measureing and remeasureing to achieve this. if you truly desire this result, measure with very accurate device's such as large caliper's, or even a tram bar. this is also much easier when the gimbal is off the boat.

good luck.