SteveJa, I have the jp modified fx21 5 port and it is awesome! Great run time, holds a tune awesome. Power is killer but the engine is very linear. I dont know about the place listed but the engine is awesome and I would not hesitate getting it.
I run the jp mod 5 port(black engine) in my mbx5t and it has plenty of power.
I also run a falcon engine in my hyper 8.5 and that one is awesome as well. Both engines are the best engines I have ran yet. Hope this helps.