RE: "custom" calls like kaiser, x-treme,etc...
About all I've been carrying lately are custom calls. Right now my "collection" consists of: three calls from Ron Clough's Close Calls, a cedar slate over slate, a glass over slate in a wormy chestnut pot and a longbox made from black walnut and syacamore, three Blodgett's, a Legacy double glass, a Tough Country slate over glass and a Tracker II box made from mahoghany and purpleheart, a Sweet Lips laminated glass call by Ted "Pete" Peters and three Cody Calls by Bill Zearing, a Cody II slate, Cody II glass and a Spec I slate.
The Spec I is my newest and favorite as of now, it looks and sounds better than all the others. A close second is the Peters Sweet Lips, although I usually don't take it into the woods.
Tyler