snap fit for cap-housing assembly

I am working on cap and housing snap fit. I want to increase the length of the cap by 20mm. With this change, I want to have a robust fit between cap and housing with a consideration that the removal force is less than 25N. Does increasing the number of snapping feature from 2 to 3 help? Any other suggestions are welcome. I am attaching the cap and housing files with a hope to get help from the community.