How hard would it be to convert a solar storm 880 to watetcooled?

First step would be to drill out the rivets and take apart and remove the heatsinks no doubt.

Does anyone know how the internals are setup?

Why would you wanna do this again? Too much heat?

Yea I would imagine heat would be pretty bad with this light but I also wonder if those 5w diodes could be any more efficient.

which version do you have

the osram version as-is is more efficient than the 5W diode if you water cooled it