Centered 510 connector is the way to go on the Splinter especially if it will be spending any time upside down.
On my SmoAnt Charon it sits off to one side and when going through a piece (upside down) exerts more pressure (weight) on one side of the connector and Splinter.
Also, I haven't felt the urge to try temp mode. Wattage mode works great with perfectly even roasting.
This thing rips too.
I can hit it as hard as i want and milk my piece in like 5 seconds at 25 watts.
This was my first try with concentrates.