I never said it was impossible, at up to 10% of a ship mass I think it's impractical. Remember hat's 11 modules for every 100 systems,decoration/hull blocks. Add lets say Ion and you now need 24 modules for every 100 systems/decoration/hull blocks.I assume you're referring to me, seeing as how my only community content is a station for the contest? If you're interested in checking out my ships so I can show you that it isn't impossible to fit a ship with an effect system or two, I'll go right ahead. I prefer to keep my designs private as I don't think my exteriors are very good, currently.
I really wish a dev would chime in here, is it supposed to be 1 module for %mass or %block because it makes a big difference. I am a little worried that 1:100 may also be considered OP but half the current values may be acceptable for all but overdrive, I'm not sure why a movement system is so hard to achieve 100% efficiency on. In default server that's only 150 compared to 75, not really a game breaker.