Is there any way that member can discuss card sleight in forum say how to reverse a chosen card invisibly? What best method can be use?example is it use invisible pass or any other alternative passes..There is no exposing only technicalty being discuss.Is it ok?

In theory that's ok....as long as nothing is deemed as exposure.

You should join us for some of the outings zinally, you have been in the forum for a while haven't you? :)
Nothing is more effective than sitting down together and really looking at each other's routines.