Good morning, Dan;
A little more information might be useful. The Quickset, Incorporated "Elevator Husky IV" does sound familiar to me. I think that was the one I had back in the 1960's-70's. I thought it was a "Hi-Boy IV." I do have a replacement one now, but it does not have the label on the center column.
Is it about 31 inches long with legs that have three sections of 20 inches each section? Does it weigh just under 8 pounds? Does it wind up about 5 & 1/2 feet high when set up, and the center column when cranked up raises the pan-tilt head platform to about 7 feet? Is it mainly made of aluminum? If it is, then my comments may apply.
The legs swing out and do not have any locks when swung in place. You swing out the legs and the weight of the equipment helps hold them out against the stops. The legs when extended are fairly sturdy. The black rubber caps on the ends of the legs are kind to the floor. You may notice some wear in the center column from the steel guide pin that goes in the groove of the center column. If you get sand or salt water in it, take it apart, clean it by washing it out in clean water, and dry it.
The only real problem I have found is the little, small steel pin that helps hold the top plate in the side-to-side tilt position. This problem appeared in the replacement Husky I bought. If you use a Phillips Number 3 screwdriver, you can take out the large flat head screw holding the top plate. Work over a large surface that will catch and hold the pin and the large thin washer that may fall out. A cookie sheet or pizza pan works nicely. Check the aluminum mounting surfaces to see if the pin has worked the hole for the pin out into an elongated slot. There are a couple of ways you can restore this, or you can just hand it to a machinist and say; "Fix, please." Keeping the shorter side-to-side clamp tight will help hold it in place until it can be repaired. Keeping it tight after it is repaired will prevent it from happening again.
Your comparison with a Bogen 3021 is surprising. I think my Husky is bigger than my Bogen 3021, especially in comparison to my 3021S. Clearly it is not bigger than my Bogen 3026.
I used my Husky mainly for holding my 35 mm camera very still. It was my first serious tripod purchase. For my 4 by 5, I have more stringent preferences. I use either the Bogen 3026 or an old Davis and Sanford Model B with an accessory stabilizing leg and an adapter plate I made for the D&S. The 3026 is about the minimum that makes me feel comfortable with the 4 by 5. The Husky does have a 1/4-20 screw thread for the camera. Most of the 4 by 5 equipment will prefer a 3/8-16 "European" screw thread. You can also purchase a Bogen or Gitzo 1/4-20 to 3/8-16 adapter to go with it. They are stainless steel. If you get a brass adapter, check it occasionally for wear, deformation, or thread stripping.
While I do not have my original Husky, the replacement I purchased recently has proven to be quite satisfactory and continues to add nice memories to those I still have of using my original.
