who did you buy yours from. ?
I got mine from Bintel and it came with the nd.filter pre installed , you should contact the seller and demand that they send the ' visual ' version as they are not allowed to sell the wedge without it , google this as there was considerable discussions on CN,s on this as quite a few American ametures threatened sueing Lunt for this reason , ' they don't work as advertised and are dangerous '.
I have the. 1 1/4 inch version and it works very well and has the filter pre-installed.
Got mine from Bintel about 2 years ago. .
I too got sick of changing the polarizing filter every time I changed an eyepiece so grabbed a Meade variable polarizing filter that fits into the wedge and the eyepiece into it. , adds 25mm to the light path and works very well.
Brian.