Hello

Because the spider is swapped when placed (https://github.com/kikugie/buoyant-spidertrons/blob/e74a0b3e25b3c11f21a87c6c610f31820188e6b9/control.lua#L23), Constructrons are not registered (https://github.com/ILLISIS/Constructron-Continued/blob/0aa6a351a8ca3a801e28fd0e61975b0f2bb1b721/script/entity_processor.lua#L126)

To fix this it is possible to register a new type of constructron (https://github.com/ILLISIS/Constructron-Continued/blob/0aa6a351a8ca3a801e28fd0e61975b0f2bb1b721/control.lua#L412)

However that will not change the pathing proxy collision mask (https://github.com/ILLISIS/Constructron-Continued/blob/0aa6a351a8ca3a801e28fd0e61975b0f2bb1b721/script/job.lua#L334)

Hi, I'm not quite sure about fixing it with the way you mentioned for a couple of reasons:
1. You request mods that register their spidertrons as constructrons be put in the list there, but Buoyant Spidertrons creates a copy of every created spidertron, which seems to be a risky move, considering it would add unknown entries to that list.
2. If buoyant constructrons would still avoid water, why make them buoyant in the first place? If that's a technical limitation of your mod, it can be made the intended behavior, and I can just add a condition that ignores constructrons when making buoyant spidertrons.