Thanks for all the responses. Understand about the FO value but I am happy with this. Besides, don't want their recoil, traverse, and elevation controls. THey will get in the way of the gun (right on the money armchair) FO's are $600-$700 so I think this gives me great value for only $250. Would be nice to have the sound though.
I bought the turret traverse hop up but it is huge and possibly, if it is possible, louder than my WSN one. I'm going to convert a servo. CO2 gun is already installed.
Looks like the idler upgrade will be a good one.
Thanks pcomm1 and your tank looks great. I was wondering what it would look like without the Zim.