joeswine Mosti uses a different method - and it sure works well for their wine. They have recently refined them even more. Yes, they want you to transfer the solids in the bottom between primary and secondary. Here is a part of one of their direction sheets.
Step
#5
Between a specific density of 1,010 and 1,030, you can now completely transfer the must in a sterile
carboy or demi-john (of larger capacity in order to avoid possible over-spills from the still active
fermentation). Make sure to include all deposits from the bottom of the pail (which still contains a lot of
nutrients for the yeast). Apply an airlock containing a standard solution of potassium metabisulfite (it is
not necessary at this stage to have a full carboy, as the CO2 generated protects the must) and let the must
ferment for one (1) other week. Continue taking your specific gravity readings at least every second day.