I can't make time to play, but here's something to think about :
*TEST-R15,testR15 ---- R15 ---- R15 ---- R15 ----
A,12.7,-5.08,["R15",STANDARD,S=2.54,R=15.0,X=-2.54,Y=-1.27],-5.08
*TEST-U15,testU15 ---- U15 ---- U15 ---- U15 ----
A,12.7,-5.08,["U15",STANDARD,S=2.54,U=15.0,X=-2.54,Y=-1.27],-5.08
*TEST-A15,testA15 ---- A15 ---- A15 ---- A15 ----
A,12.7,-5.08,["A15",STANDARD,S=2.54,A=15.0,X=-2.54,Y=-1.27],-5.08