I decided to fab a spot welder holder/mount that could be used at more than one shop location with the use of a vise. My welder is the Hobart HSW25,22volt. Materials used were 2" sq./1/8" wall tube and 3"x3"x1/8" angle steel. In order to secure the welder when in place,the back of the handle has a slot cut in it to accept the rear strap,and two 1/4-20 thumb screws index into drilled pockets located at the front of the transformer body.
Simple and secure,portable without having to dedicate permanent floor space with the typical spot welder stand. (No need to build this,as our little yellow brothers in the east will have it copied and available in a few weeks since the pictures are now up....).