My diy rocket tooling

[ClintonPyro]

I made a tooling for 5/8 I'd core burning rocket, the spindle is 4inch in length and 8mm in diameter and its non tapered, from top to nozzle is both 8mm. Does it still perform good? Despite the non tapered spindle and what you guys think about the outcome, thanks for answering my question 

[ThunderEx]

I think you will have a hard time removing the finished motor from the spindle. It needs to be tapered to release!