I had more or less the same problem: in one baseclass form I had references to all grids, to automate cascading updates/deletes, reference to the first control in the form and so on. After a while the form became much too complex for maintenance. I have solved the problem by storing the full name of the objects I want to reference to variables or arrays and then working with the objects using eval() ie:

ThisForm.ReferencedGrid = "ThisForm.Pgf.Page1.Grd1"
with eval(ThisForm.ReferencedGrid)
.SetFocus()
for n = 1 to .ColumnCount
...
...
next
endwith

HTH