I now have the GGTS with the extension kit. One question though. What do I need to be able to use something such as a spheroid rebuildable atomiser. At the moment I need to take off the top part to be able to screw in the spheroid and it doesn't look good. it does not fit with the top in place as the connection area is way below the top section. Someone told me an extension piece would raise the connection area but the ones I have don't allow the top to fit. i need something to raise the connection screw to be flush with the top. I hope this question makes sense.....!