Here is a link to another thread… It does not include that particular part but there a quite a bit of discussion in terms of parts warping despite of extensive supports and multiple different orientation.
By far my best success is printing perpendicular and on the platform… but even then with some larger flaws parts there has been some degree of warping. Most of the time this will probably not be an issue, but if you have enclosures and the lid pulls away and leaves an opening, it is very obvious all of a sudden 
Do you have early layer settings maybe for printing directly on the platform with Tough 1500 V2? I have settings that is ok for V5 (not perfect though) but bot sure I can use the same for Tough Resin?
Thanks, Friedl.