Hello Chuck,
I am also doing the Heller Victory.
There is little evidence that Victory had 'nested' boats on the skid beams.
Her complement of boats although no doubt variable throughout her long career, in the early nineteenth century around the time of Trafalgar, she had six boats comprising:
34' Launch, 32' Barge, 28' Pinnace, 18' Cutter (on the Skid beams) plus two 25' cutters on the Quarter Davits. There is some scope for argument about the size of cutters carried, but current thinking has settled on 25' as carried on the restored Victory.
I have had some difficulty in relating the scale sizes of the 'Heller' boats to these dimensions, and according to the stowage arrangements on all the plans I have, Heller have the boat chocks on the wrong skid beams.
The three largest boats should be forward on the beams to the Foc'sle break, which allows for stowage of the small cutter behind the Barge and the Pinnace.
Heller describe their boats as Long Boat, Pinnace, and Dinghy
The largest Heller boat measures 102.85mm which equates to a scale Barge.
The second is 98.69mm - is that the 28' Pinnace?
The third is 79.8mm - most closely relates to a cutter.
The largest boat carried is the 34' Launch which is not provided by Heller. (The shape is all wrong for either of the other two to be taken as a Launch)
If you decide to nest one of the boats, certainly in the mid nineteenth century , boats were nested by removing the thwarts of the lower one, even so one would imagine that some sort of supporting chocks would be required inside of the lower boat to give support to the smaller one. Removeable thwarts were common much earlier to allow carriage of casks and the like.