I just received two sets of kits from them. Someone isn't giving you the straight skinny. There is a piece of 1/2 inch pvc cut in half in the kit to hold back the spring when you unscrew the end caps. In fact they will send you the kits for free.The o rings are a one size fits all
You do the complete job from out side the boat. You don't remove the cyl. Hold off on the new cyl, until you talk to Bennett
Hope this helps
Troubleshooting: Leaking Actuator - Bennett Trim Tabs
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