After doing some reading on misfuelling failures, found this fascinating post further along dweisel's original thread on HPFP failures.

VW TDI forum and Audi TDI forum - myturbodiesel.com - View Single Post - dweisel's HPFP Analogy of a Failure

It seems that specific HPFP run in procedures may be beneficial, specifically avoiding high rpm for up to 5000 miles . Lubricity is critical for low-sulphur (?all diesel now) diesels. Biodiesel has higher lubricity and some people are advocating adding biodiesel routinely. Running a low fuel tank apparently results in hotter fuel due to fuel recirculation and less lubricity for the pump. Water in the fuel tank is a considerable risk.

The full post is well worth a read.

So at this point, I'm going to stick to Vortex diesel (has biodiesel in it) + Morey's Diesel Smoke Killer, fill up much earlier, and avoid the rpms and keep my fingers crossed for a long-lived CRD HPFP.