I made a few nozzles for mine also, first a smaller diameter circle, then a slot, and finally a showerhead. I just made them out of some nylon kitchen cabinet inserts that came with some hinges...I just had to sand them down a little bit to get them to fit in then I used a drill press and dremel to make the nozzle types.

I ended up liking the showerhead style best...lower restriction and it had the best performance from what I could tell on my few tests. I think I gained about 1C with the small circular nozzle and 2C with the showerhead style.


Slot

Showerhead


I also bowed my fuzion with really good results, but I made my washer with some thin plastic I had lying around:


Here it is with the washer in place, I just used a small amount of "Yamalube" to adhere it in place before installing the top. Overall I think I gained at least 3C with the bow...very much worth the effort.