Now that I think about it (and while holding a racket in hand), it feels very unnatural to use a complete panhandle grip for net shots at all. You have to twist your wrist a bit too much for it to feel comfortable. The same goes for net shot in the backhand corner. What would be equivalent to the panhandle grip for forehand would be a complete backhand grip at the backhand corner which also feels unnatural and putting strain on the wrist and arm. Not to mention if you try to do anything else then a net shot...

Cheung, did you try the general grip yet?