Stupid questions from a non-squonker. Q1. Can you use a squonk mod as a regular mod? Q2. Are 510 pins in squonk mods usually spring loaded? I ask because I'm thinking about getting a Sigelei Fuchai 213 Squonk mod for cheap because it takes 21700/ 20700/18650 and because it has a door to cover the bottle area. But the pics I see look like the 510 pin is more recessed than on regular mods and I could not find anything about it having a spring on the 510.