Ping28,
Welcome to the Nexus.
I encourage you to take a thorough look around as there is a wealth of helpful knowledge here. You might want to start in the Wiki where there are extraction teks.
I've never used one of those pens for DMT but I do know you've got about 30 seconds to get everything done and then there is massive tolerance.
So maybe preheat the contents of the pen before you take the first hit. Make that first hit long and slow and hold for 10 seconds. Repeat for deeper effects, but after 30 seconds you are wasting DMT.
I do hope you find what you are looking for here and again want to warmly welcome you.
"But even if nothing lasts and everything is lost, there is still the intrinsic value of the moment. The present moment, ultimately, is more than enough, a gift of grace and unfathomable value, which our friend and lover death paints in stark relief."-Rick Doblin, Ph.D. MAPS President, MAPS Bulletin Vol. XX, No. 1, pg. 2Hyperspace LOVES YOU