Linking over from the Atlanta Beta thread (don't judge me . . .)
Ok, so, I've tried spaced coils in two Aqua's with two known gunkers (Radio and Virus). I made Radio a 28 g 8 wrap, Virus a 29 g 8 wrap, turned them on the Gizmo, which made them contact coils by default, but then took the 1 mm mandrel and turned it through while the coil was still on the 2.4 mm mandrel to space them quite nicely. Why not use a screw, you ask? On the Aqua's, one of the posts is higher than the other, and I'm OCD enough to wrap the coil pairs in reverse crank rotation, to make the high end of each coil match the high post.
After wrapping and spacing, I squeezed one time (coils were too wide), and they were just right. Mounted, wicked with Rayon, thinned tails into the channels, just like you should.
Observations are: Spaced coils are easier on wicking than contact coils. I expect it has to be due to heat density, cooking an amount of wick volume with an amount of heat, spaced coils vastly increases the wick volume and decreases that ratio. The radio wick is quite dark, but by now (4 tanks) with a spaced coil, would be plugged and burned through, the Virus wick was good as new after 2 tanks, prettly clean looking. However, I do have to increase watts by about 20% to get the same vape, that thing about contact coil cooking efficiency is quite real. If you don't mind cleaning and re-wicking, I'd go with contact coils and less battery charging. If you have *cough* 4 dual battery mods, you seriously can cut your work time with spaced coils.
Tomorrow is space the coils on Atlanta and Frenilla day.