yea, a person can sit on the far side of the big dot and yank an explosive opened handed backpin to the long hole and you may do that from pressure and release...meaning you are winding up, using pressure, and then letting go in which case you free up those muscels I am talking about but with the exception of our backpin shooting friend in MI, there isn't anyone who can do that both ways and they can't do it from at or inside the big dot
be that as it may, I was referring to the wrist version of the shot anyway...if you shoot opened handed you give up a lot of the unique control that the backpin offers...I have heard of backpin shooters and was taught by Jevat Meha originally and was around Petros (sp) in chicago in my TS days but I have never seen one that can do everything I can do off the middle man (I can do the kicks and such but they aren't a regular part of my offense although I will use the pull kick once a match maybe and the pushkick once in a while)
on TS I was unraceable especially on the push side but age and a different table have taken that away
but, a smooth, musceless take off, no pressure or grip, was key then and still remains key today to maximizing the back pin lateral speed