How many of your 35 posts are spamming your PVMA thread warp?
Jrd: I'm guessing that you want to use your 901 mods/batteries for a 510 atomizer? You'll need a dead 901 atomizer, a dead 510 battery, some wire, a soldering iron, and a piece of tubing (preferably from the battery of the 510)
Extract your connectors from each, wire the positives together, wire the negatives together (run the wires through the tube) and then a quick tab of epoxy or jbweld to hold each connector into the tube. Now you just screw it onto your 901 mod/battery/passthru and then screw your 510 atomizer onto your adapter. Easy peasy