It took a couple weeks to gather the parts and tools to assemble the Extruder Controller V2.2. The Extruder kit was ordered from makerbot.com. The Fisher Scientific isotemp hotplate was found on eBay and it has temperature graduation that seems accurate with an infrared thermometer. Reflow solder seems daunting at first, and I had a tendency to lay on too much soldering paste. I used the 22 gage 0.017" applicator tip and it still seems too big for the tine AVR ATMega168 TQFP chip. I worried about bridging with too much soldering past and ended up smearing the tiny pad with a q-tip in an attempt to clean up the soldering pad areas I also worried about the applying too much soldering paste for the two slight larger surface mount IC, however reflow soldering seems quite forgiving. There were a couple pins that bridged during the reflow process, but I was able to remove them using copper wicks. Visually, the result looks okay. Next are the through hole soldering. Images can be found in the image gallery.