Good info, thanks. I`m still expecting the answer from AE. I don`t know enough about transformers/chokes making, and can`t say is wider bobin then core some design choice that doesn`t "threat" the performance here, or is it a large mistake?! From this reason, I`d like to have a complete set of data...and good communication with manufacturer...and low price...and... About mounting this core/choke - I didn`t have experience with this core material before, very thin layers and mechanicaly fragile (core and winding). I think that rubber/plastic combination didn`t stress our sensitive choke too much... Unfortunately, I don`t have a measuring devices for thorough test...