I have a jam that I have been unable to clear thus far. After talking with Prusa support, we think it may be as simple as replacing the PTFE tubing. I was about to pull the trigger on purchasing from Prusa last night, but ran across some technical issues on the website - maybe for the best since it does cost so much for shipping from Czech. I am in Texas. Browsing the web, I am finding myself confused with getting the same parts that originally came with the MK2. I know it is the V6, but just want a little nudge of exactly what I need and where to buy. I would like to know what options I have for the tubing, the hotend itself, the nozzles and tools that are more reasonable shipping costs. I would like to know my options. I have found the following are authorized E3D resellers. http://www.filastruder.com/ http://www.3dmakerworld.com/store/parts-accessories/hotends/e3d-v6-full-kit http://www.makerfarm.com/index.php/hot-ends/e3d-hot-end-parts.html http://store.makerstoolworks.com/3d-printer-extruders-and-parts-s/111.htm http://www.matterhackers.com/store https://printedsolid.com/collections/accessories-and-upgrades https://www.printitindustries.com/collections/e3d-1 https://www.ultibots.com/e3d/ https://www.smw3d.com/e3d-parts/ I notice a blue wrap? For some reason I am not recalling this when I built my Original Prusa i3 MK2. 12 volt? 24 volt? Bowden? Something else? Just want to make sure I order the correct parts. Also looking for community feedback of if I should avoid any of the above companies or if there is a recommendation for a certain one. Thanks in advance.