wow that's not bad at all - I've just been researching these mods though, and they don't really turn out cheaper than koralia 4s once you buy the maxijet, mod and then the magnet. Plus apparently they're noisy
I had max-jet for years and just recently switched to koralias, i have 2 #4 and 2 #2. I am much happier with the koralias,they are a little noisey on start up but the flow better in my opinion,beacuse of the wider width.I have them on a wave maker and they switch every half hour(hence the noise). I like the fact that they are easier to aim in the tank also, as they rotate in any direction. JMO and 2 cents