This business of aiming for fat combs in supers is a good one, it greatly reducing the amount of work in extracting the same volume of honey. When I first started I used Hoffman type spacing frames in supers, but now I use the old fasioned wide metal ends. The reason is that you can stagger the end lugs (one in one out) to give about 14 frames per super, a very quick lining up of the ends, (and removal of extras to other hives) then gives the 8 frames per super. The only problem is if there is a flow on and you forget to change at the critical point, and you end up with lot of wee skinny combs which are mostly wax. The added advantage of this is also that after a season or two, when you have nice big fat combs, you can throw away your queen excluders, because the queen hates to lay eggs in these cells (they are too deep), this makes the bees even more productive, and also happier. Steve Kilspindie