Had a look at some of the figures, the x values seem to be reversed, I think I recall you saying something about medievals co-ords being reversed on the x axis somewhere gom, the converter catching this with regards to bounding spheres? The pikemen and lancer models spheres encompass all of their model including the weapon in the basepose, so the centre is going to be different for
every model. Quadrupling the values wont necessarily give you the best values. Some rough values for the bone giant bwian:
-0.244
-0.348
2.850
5.234