IRF is pretty helpful in understanding more than you want to know !
http://ec.irf.com/v6/en/US/adirect/i...e&punchInID=71
Here's the PDF of those 7317s I used to use... actually, I'm pretty sure a few of the others listed would work as well, still looking for the 3010's info.
Lotta learning to do myself... current questions:
Do fets only operate within certain recieved "signal" parameters ? (is this the ID channel column ?) Is the rating shown a minimum... ? Somebody smart... please help ! It would be very cool to know exactly what fets are compatible with the Zs... I have a feeling it's all been guess work up until now. (or has someone already gone through this process ?)