After my recent upgrade to the E3D V5 hotend (as reported here), I have now received my E3D V6 today (I ordered only Tuesday this week, and although the lead time for the V6 was supposed to be a week, it shipped the same day, and was delivered today, this Friday morning, in only 3 days, from UK to the Philippines! Wow!). With a new hotend come new questions... And I wonder if anyone else of you who have installed the V6 have run into the same, so far. Fan confusion. In Tom's review of the V6, at around 1:00 in, he states: "... the V6 also comes with the updated and quieter seven-blade fan instead of the noisy five-blade one that came with the early V5 hotends." Now... In my case, the V5 (ordered and delivered mid-May) already came with a 7-blade fan. However, the V6 that I received today comes with a 5-blade fan. The labels on both fans are exactly the same: "RD3010B12H, DC12V, 0.08A, Two Ball" So... Is this just a shipping mistake? Or did Tom get it backwards? Should I keep the 7-blade fan (already wired up), or switch it for the new 5-blade fan? One of the main things I'm trying to achieve ever since I got my RoBo is to print flexible filaments like NinjaFlex or Flex EcoPLA. I have had some success following codeblue's instruction here (inserting an 1/8" brass tube into the extruder), and I was at least able to print Flex EcoPLA. No success yet with the (much softer) NinjaFlex or Flex-PolyEster (Shore 40D), they keep curling up in the extruder. Now, from what I understood, the piece of PTFE tube that comes with V6 could be run all the way up through the extruder, until just below the hobbed bolt, to allow for a better lead of flexible filaments. Howewer: The PTFE tube's outer diameter (4mm) is way to thick to fit through the duct in the extruder. My question: Has anyone here who has also installed the V6 been brave enough to extend the duct with a 4mm drill, so the PTFE tube can fit? Is this advisable, or are there any strong arguments against doing that? And... If it goes wrong, which part exactly do I need to download and print as a replacement? Is that part available somewhere in Thingyverse? Thanks again in advance for any ideas and suggestions.