For example piece number 113 in the 22" Tulip pattern:
Drawing the pattern on the glass.
cutting the shape
extra cutting for relieve of inner curves
first cuttng off with the ZAG ZAG,
grozzling the inner curve very carefully,
while there is enough glass left on the other side for stability .
By reducing the waste glass as much as possible from the other side with the ZAG ZAG
I get the best chance to keep the piece
This method works in 98% of all cases.
I think there is no grinding necessary,
because the shape of the upside fits sufficient.