Hi Dan, Thanks for the updated comments!
One further clarification, it seems to follow that ((a-h)/2,(a-i)/2,a-c)-(-(a-h)/2,-(a-i)/2,0) therefore define the limits for M101? Would in that case
#define SKYCAM_MOTOR_SIZE (0.0f)
and setting limits to the measured anchor bounds rather than frame bounds be equivalent? Just trying to check I understand the parameter intent (basically to shrink the XY limit space).
// i---------------j
// / /|
// / / |
// a--b g--h |
// | \ / | |
// | \ / | |
// | \ / | k
// | fff | /
// | |/
// c-------d-------e
Edit: hopefully code tags fix the image