Has anyone ever used one of the heil replacement elements for the D104? I see they make these and was wondering how well they work? The D104s are geting hard to come by as we all know and alot of the ones that I come acrost have bad elements. I see some guy is selling replacement ones on ebay but I figure the heil is probly better. If anyone has tried the ones on ebay I would also like to hear how they worked becouse some of the locals are just looking for new elements.