does anyone else have trouble getting the filament to go into the hole of the titan when initially feeding it. It seems that if you don't have it exactly square, it won't feed in. I eventually get it, but moving the filament a small amount and sometimes having to bend a tiny bit of the tip, to get it to go down the hole? Is it OK to wide just the top of that slightly? Since the hole in the handle just takes the ptfe tube, it doesn't do anything to locate that until it's inserted, so nothing guides the filament initially.