If you can carry an 8D, I will try real hard to not get in a fight with you. The 8Ds I put in the performance cruisers (read retired racing racing sloop) tip our scale a 168#. I haven't been able to carry one of those for years. I can still lift and move a 4D (136#) but carrying it just isn't going to happen. When I explain to an owner that installing a 8D requires rigging to lift it with the main halyard or the like and service at a mooring is impractical, we often back off to GC2 or T105. We do very little of this business since the depression started, but I may be coming back.
Matt