My sense on how "easy was it" for example to replace a lost Firefly made me wonder if they were able to keep enough of them in reserve? They could have sent a few more initially (and i.e. kept absolutely none in reserve) - but this would not have made sense? Given that they were "turning them out" - I wondered how "hot off the presses" these reserves were. One of the first reserves that the 24th L seems to have had to disembark seems to have been sunk immediately on arrival, and with the loss of all of its crew (5 or 4-1=4 or 3) bar one (cf. NHLp82) - albeit again whether they actually disembarked with "all crew" on board is another querulous point. The loss of these (potential) 3 or 4 crew in a regular Sherman or Firefly at the beach, might however have been "accounted" elsewhere, as it had me wondering if they would have been 24th L or as classed as reinforcements have been in a category of "unassigned". So a bit more detective work/head scratching required there, to work out a bit more detail on this.