Hey Combustible Lemons,

as far as I know you have to calibrate the Peachy before printing anyway.
This should also include setting the dimensions correctly.
In the end if the math of the software is correct and good, the factor limiting the accuracy will probably be the manual calibration.

Compensation for shrinking would be really cool!
Although I think it won't be that easy as the shrinkage probably isn't homogeneous.

... and please don't burn my house down

quertz