I am currently using 4 of them in turbine jets with great sucess! They are quite a bit cheaper than the powerbox, also lighter. I also have used the powerbox 40/24 in my 40-50% aerobatic planes but have switched everything to the Power Expander. I am Very Happy with their performance! Anybody want some used Powerboxes I've got four of them in the shop not being used.

David S