Joe,
You said "There is some movement in the design". Do you mean the side to side sliding of the brush tubes?
Are you aware that that movement is to change the rotation direction of the motor? I know that these slide on the motors with the table top stand. I haven't tried to move them on the motors that are attached to the machine.
The tubes can be very hard to slide. Don't force them.
On these "jack rabbit" motors with the stand (as compared to the bracket attached to the machine) this rotation reversal was to accommodate different machines. They were advertised as being able to make any machine electric by placing the motor behind the machine with the pulley in contact with hand wheel. And check the last picture, it will whip cream and salad dressings. This motor and booklet are from 1916.
[ATTACH=CONFIG]439939[/ATTACH][ATTACH=CONFIG]439940[/ATTACH][ATTACH=CONFIG]439941[/ATTACH][ATTACH=CONFIG]439942[/ATTACH]
I know this is toooooo much information again,
Cathy