Hi John

I am fairly new to forums thus may not be posting right. Please bear with me if so. Your advice couldn't be more valuable!. Have had my share of sleepless nights on the quintessential ios devices before :-)!. The Mac's gone today and may back within this week. Will stick to native ios and reinstall AutoCAD 2017. Will post after using it for a couple of day on some heavily rendered files. I really appreciate your readiness to help and your concern. 

Thanks again and have a great weekend yourself.

Regards

Shekhar.