Here's a trick to mod the Kayfun5 into MTL like it would be with the aftermarket accessory inserts.
A 5 wrap 26/32 Clapton on a 1.5mm dia mandrel works out to a final dia of 3.1mm, same as the center pin airhole.
If you think its just a slide in fit, you'd be wrong, nor can you just force it down the airtube, you have to sort of screw it down clockwise to tighten the dia of the coil and push it down flush with the surface, it then springs open and grips the sides.
This results in the center air tube being restricted from 3.1mm down to 1.5mm, resulting in lots of flavour.
Perhaps with heat build up over time it could loosen, time will tell, so far its behaved through 2 tankfulls at 36W with a 6 wrap Clapton, ie lots of heat.
A 5 wrap 26/32 Clapton on a 1.5mm dia mandrel works out to a final dia of 3.1mm, same as the center pin airhole.
If you think its just a slide in fit, you'd be wrong, nor can you just force it down the airtube, you have to sort of screw it down clockwise to tighten the dia of the coil and push it down flush with the surface, it then springs open and grips the sides.
This results in the center air tube being restricted from 3.1mm down to 1.5mm, resulting in lots of flavour.
Perhaps with heat build up over time it could loosen, time will tell, so far its behaved through 2 tankfulls at 36W with a 6 wrap Clapton, ie lots of heat.