Before I make my very own tren for the first time, I was wondering if there are any general tips for making all gear that one should know. Like I remmeber seeing this question but I can't find the thread, how do you prevent any losses from your syringe when switching from the filter to another pin to draw some more oil and then back to the syringe? Things like that. It would be nice to have a thread with any important details to keep in mind when making gear.