More nylon printing on my stock Rostock Max. The seemecnc hotend took some fiddling to get it working well with PLA but it extrudes taluman nylon 618 really well with almost zero effort on my part!
Be careful with your seemecnc hotend at 247C! You’re pretty much bang on the line of failure. One tiny fluctuation in heat and your hotend might be a puddle…
Heh. Yeah it’s right up to the edge. I think it would be impossible without the active PEEK cooling and a decent amount of insulation on the heater block. E3d would be sweet but my hobby fund is dry temporarily. 
Side note, @Sanjay_Mortimer1 , have you tried the platinum wire high temp thermistors in the e3d? It sounds like a perfect match, I got a couple to play with from Mouser but haven’t had time to test them properly.