I want to make sure I am understanding the way this works correctly:
Lets say I have Gvaerrggoursu in play as my crew. Gvaerrggoursu has

. If I give Gvaerrggoursu Body Pistol which grants

, Gvaerrggoursu now has

, instead of two

.
Now, lets say Gvaerrggoursu with his Body Pistol also gets Med Kit which grants

. As LONG as Gvaerrggoursu still has his Med Kit on him, I can play the

Surgical Intervention onto Gvaerrggoursu and resolve its effects for

.