No problem, yes that’s true that disguise can be important it’s just hard to judge that when training alone of course. Definitely the backspin and then disguised topspin one is something I use a lot and it can work so well!
The backspin and float varieties with slightly different contact information s worth keeping going with too as you said, really nice to have that disguise and feel like you can get some cheap points. The follow through will take time to develop and its about making it natural I think and not over forcing the exaggerated follow through. But keep up the good practice!
