K. Radius. Have it still continue to do what it does. (Calculate one, that is) especially if it is importing a DAE. If it's already a POF, it should already have a stored value, yes? So it will load that.
But like MOI, you can either Recalculate it, or enter in your own values. Make sure it can not be accidentally done by having a lock/unlock button. See, even when you "Load" data from another model (like when you import from a Retail model) the Radius changes, but when you save it again, it goes back to the calculated one. But say you unlocked the Radius and then hit "Load", it should then replace that Radius with the imported or manually entered one when you hit "Save" (along with potentially a flag bit somewhere that registers it as a "Stored" rather than "Auto-Calculated" so that it won't attempt to auto-calculate it again if the bit is present). If you find you've made a mistake, re-open the POF (or PMF), unlock it, hit the recalculate button or even better, have a "Reset" button that clears the "Stored" bit and restores the "Auto Calculated" data by recalculating it.
Complicated? Perhaps. But not everybody knows where to go in the model with a Hex Editor to accomplish the same thing, and I'm pretty sure (Droid803 can confirm or not) that when set that way, it stays (as far as I know).