Here is my solution using the Harvey overarm blade guard on a K3 Winner. I attached the bottom of the support leg to the base¡¯s bottom return flange and the upper portion is attached to the sheet metal extension table. It¡¯s very rigid. Harvey seemingly spared no expense in the design of their overarm blade guard. It has centerless ground tubes, a gas strut and a roller guide for raising and lowering the guard, large arm support castings and die cast guard housing. It¡¯s expensive at about $1k and probably over designed but looking at the other slightly less expensive options I think there is good value for what you are spending. Dust collection is as good as any overarm blade guard, meaning not stellar, but I have since added some brush material to the x-fence side and the trailing edge and that helps. I installed it mainly to get rid of the riving knife mounted guard so I could make partial through cuts and travel over the riving knife as well as the added safety of keeping my hands from wandering close the the blade. I have experienced no loss of functionality and can raise up or easily swing the entire guard out of the way with Harvey¡¯s excellent swing joint design.
Kevin Wells