May I know if the Sabine Feedback Exterminator (FBX 2400/2410) is still widely used? I tried looking for reviews, or online shops that sells this but I hardly find any. (only 3 sellers in ebay for their supposedly new 2410 model). I tried to email them like 7x now and they never replied back. Are they dead already? I prefer them over the dbx Feedback Suppression AFS 224 but if they are dead then i guess dbx is the only way to go (unless there is something better). How is the performance of the dbx afs224 anyway? Do you think its at par with the Sabine FBX 2410?