I think I read in that thread that you could use the sure flow set up.

I thought about it and what I was gonna do was this....

Purchase Koralia4, MJ1200 and sureflow kit.

Use the larger prop/mag on the MJ1200 to have the modded MJ
Take the smaller prop as well as the original impeller from the MJ and use in the K4

This would give me two super high flowing powerheads!