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ATM TUE Problem



Hi

 

I need help in correcting a severe TUE on my 8” F/7 Mirror. ROC Difference is about 8mm. I haven’t tried anything except a slightly longer stroke somewhere between 1/3 and ½ but these hasn’t been much difference. Mainly staying away from a ½ stroke in fear of a central hole. Should I use a localized small tool or can this defect be cured by texereau’s method of a ¼ stroke with pressure on the edge.

 

Thanks

 

Aditya Munshi