I am getting ready to order some tortoise switch machines. I have been doing a search's on the topic to find out more info on the wabbits (dual hare) but havnt come across talk about the feed back part. Has anyone had any experiance with the hare/wabbit FB's series. It says that its for feed back to loco net type systems. Would it be worth the extra money ,$8.00 per if I dont have the loco net . can the feed back be used for anything else.