ORIGINAL: vicman
You can see weight taped to C4F's plane. I taped some weight on the back of mine too. Small price for the grace you will pick up on landing and take off.
The lead weights were glued and screwed to the tail of my Magnum durring final assembly.
Do not trust the sticky back tape for external mounting.
The flat on the back of the fuse is the same width as the lead weights, GreatPlanes brand.