ISplitShank

Returned by SplitShankApi - a cathedral-style band that opens into two arms toward the setting. Multiple gems, so no single mother gem. Adds to IParametricObject:

Member	Meaning
RingSizeLabel / RingSizeRegion / RingDiameterMm	Ring size
Curve	The rail the band is swept along - ISplitShankCurve
Sections	The three swept profiles in rail order - ISplitShankSection each
Gems	The pave run along the arms - ISplitShankGems
SetSection(index, position, width, height, type=None, profileName=None)	Edits one section in place
SetSectionEnabled(index, enabled)	Toggles one section

Every setter regenerates the shank in place (same Guid).

The rail (ISplitShankCurve)

Member	Meaning
ArmHeight	Rise of the arm tips above the ring top, mm
ArmAngle	degrees
ArmOffset	Extra outward bulge beyond the reference shape, mm (signed)
Tangent / TopTangency	Tangency controls
OpeningLength	mm
SplitWidth	Separation between the front and back arm pairs, mm
SplitStart	Where along the rail the split begins, 0..1
LateralDisplacement	Y displacement of the arm tips, mm (signed)
LateralInclination	Inclination of the arms along the finger axis, degrees (signed)
SetArmHeight, SetArmAngle, SetArmOffset, SetTangent, SetTopTangency	The arms
SetOpeningLength, SetSplitWidth, SetSplitStart	The split
SetLateralDisplacement, SetLateralInclination	The lateral shape

A section (ISplitShankSection)

Read-only values; edit them through SetSection on the handle. The list is ordered bottom (Position 0) to arm tip (Position 1), and a split shank always keeps exactly three.

Member	Meaning
Position	T along the rail: 0 = ring bottom, 1 = arm tip
Enabled	Whether the section is swept
ProfileName	RING_PROFILE asset name, "" when unset
Type	"SOLID", "COMFORT" or "THICKNESS"
Width / Height / Thickness / Comfort	Section dimensions, mm
Rotation / Displacement / Orientation	Profile placement

The pave run (ISplitShankGems)

Member	Meaning
Enabled / Shape	Whether the run is built, and the stone shape
TopSize / BottomSize	Stone size at the arm tip and at the ring bottom, mm
ShankSize / TransitionSize	mm
ArmSpacing / ShankSpacing / MinDistance	Spacing per zone, mm
Angle / Margin / InnerMargin / Vertical / MoveInZ / GemInside	Placement
InnerWidth / InnerHeight / BrightCut	Channel, mm
ProngType / ProngHeight / ProngDiameter / AutomaticProngDiameter	Prongs
DrillType	"NONE", "ROUND" or "QUAD"
ChannelShape / ChannelClearance	The channel the stones sit in
FlipStart / FlipEnd / VCutters	Run ends and V-cutters
StartOffset / EndOffset	mm
SetSizes(topSize, bottomSize), SetSpacing(armSpacing, shankSpacing), SetOffsets(start, end)	Paired setters
Plus one setter per remaining member