^ that is what I'm worried about.

I'm worried about installing the KMD pump internals, getting the APR HPFP file installed, and my HPFP failing and doing god-knows-what kind of damage to my engine, because the APR HPFP file was meant for the APR HPFP only.

I suppose I can't expect APR to support KMD's build quality -- but perhaps they can clear up what the risks, if any -- are.