I use the bugle tube thats made by Rocy Jacobs,I'm pretty shure it's the same place as Idahoelkinstructor get his.Mine is the colasible one.It's easy to use,and you can use the mouth pice or pop it off and use you diaphram calls to.
I used that primos call last year and threw it away after a hour of tring to get it to work.
I do use 3 of there reed type calls,hot-lips,hyper hot double and single reed,and brown,white,blue,red and yellow diaphrams.I also use the hootchiee-mama and the Carlton squeeze me cow call,along with his estruse whine.
BBJ