Making a sponge out of these modules requires some tenacity and luck. It took me 6-8 hours to make this little thing (that includes cutting all of the modules). I'll probably make a level 2 sponge in the future, though I'm doubtful that I'll use the same kind of modules that I did with this one.
Au contrair my friend. If you want to do a lvl. 2 it only gets tougher the smaller the modules, because of handling; but putting that aside, you did a great job mate.
Many thanks, and I'm not going to use smaller modules for the level 2 sponge (because I'm not crazy). I may use a variant of the sonobe module for it, though. I'm still not sure.