Daniellyall
You very well may be right, but I'm running out of time and money, so only if it's a massive problem will I change either the ballscrew or the motor. Thanks for the suggestion though.
pipping88
The hole is also 80mm deep, I don't have, nor do I want to buy an endmill long enough for that. And to be honest, I think the boring head is faster at this point, the rotary table seems to have developed a massive amount of play, not just standard wormgear backlash, but the table tilts side to side, so I can't take big cuts... Not even medium cuts. And that's why it took me 18 hours to cut that complex hole.