Here's the FIX for Friezas Leg gap.
Now it is simple enough but I need to stress a few points of this mod if you're going to do it yourself. Always use a fresh blade an xatco blade since there the best IMO. tweezers are something you will need. The pictures show everything you'll need except two things. 1 cup boiling hot water and 1 cup ice cold water.
you want to start out by removing his leg from the ball joint.
then taking the blade and very gently shaving off small layers of the inner thy where the ball joint rests. If you look inside his thy where the ball joint fits you will see that the slit area is more narrow then the other legs, this is a common QC issue.
Now just take your time and remove small shavings test fitting the leg back onto the ball joint to make sure it fixed or not.
after several shaves and tests it finally fit into the more narrow (now less narrow) area removing that unsightly gap. However I did notice that when posing my freiza his leg was a little loose. SO this brings us to the tweezers and hot n cold water.
boil(microwave 1 cup water for 1 min 30sec.) and have 1 cup ice cold water on standby.
now take the newly trimmed leg and dunk the ball joint area into the hot water hold there for at least 45-60 sec. then remove, take the tweezers and wiggle it into the area between the fitted area where the ball joint rests and squeeze the ball joint space tightly and hold dunk into ice water and hold for 60 sec. bring out of water remove tweezers and dry off. Now pop on that nice tight joint and presto no more gap with a nice tight joint.
First two pics are before the end 3 are after hope this helps out.