"bludgeon" makes me think of a short, rounded, cricket-bat-style piece of wood that has been sanded down to a nice texture, preferably with the blood of a previous victim, like a seal-basher of sorts. that way you can burn the evidence, and it won't be heavy and hard to wield. though a lead pipe would work too. why christmas santa's though? you should go for the jesus baby at your local church's nativity. no lawsuits ; )

Tell your dealer what the model of the machine is.

if this is the one that you have http://ecx.images-amazon.com/images/I/317nru7Ts%2BL._SL500_AA280_.jpg you place it under the shaft and you lower it it will snap on in place , if not there is a screw on the left side loosen that and attach the zipper foot and re fasten the screw.

If you want send me the model # of the machine and I will try to help you out.